Protagonists
Savage Ravagers
Cinos The Werehog
An artificial mutant E.V.O. werewolf/werehog lifeform created by Eggman as part of the E-Cryptid series and is leader & patriarch of his brothers to the Savage Ravagers. He was put in stasis by Ultron until and help the Next Avengers to stop his and their enemies but mostly act as a third wheel for Francis and Torunn, he have strong friendship with James.

Buck
A weasel with an eye patch who is from planet Primatopia which many prehistoric creature were brought by Keeper. The second-in-command and the wise one who mostly hang out with Azari.

Stitch
A koala-like alien experiment who was created by Jumba and Hamsterviel to be use to destroy large populated cities. Serve as both the brains but less of the muscles who hang out with Pym.

Toothless
A Night Fury with a prosthetic tail who is from an alternate HTTYD universe which many dragons are save by Keeper. Serve as the flier and air support who hang out with Torunn.

Rufus
A genetically altered naked mole who created by Drakkon until he was save by Ron Stoppable but given to Buck as his owner. Serve as the team mascot and spy who hang out with Francis.

SR Allies (Autobots, Enhanced Mini-cons, others)

Grimlock
An Autobot Dinobot that transform into a mechanical Tyrannosaurus who is from the Alchemor prison ship

Tricerashot
A Dinobot Mini-con that resemble a mechanical Triceratops & transform into a cannon who is partner of Grimlock.

Aerobolt
The Mini-con leader that resemble mechanical eagle & transform into a chestplate who is partner is Optimus Prime

Sawtooth
A Sharkticon Mini-con that resemble a mechanical bipedal shark & transform into a trident who is partner of Strongarm.

Buzzstrike
A Mini-con that is normal in appear similar to Autobot Mini-con & transform into an axe who is partner of Bumblebee.

Hi-Test
Another Mini-con that is also normal in appear like other Autobot Mini-con & upgrade with flights with rockets.

Robo Knight
A robot 6th Sixth Ranger that is the protector of the environment of Earth during his time in the Mega Force Rangers battle.

Next Avengers
James Rogers
The son of Captain America and Black Widow who is the leader the Next Avengers. He have great athletic skills like both of his parents which they have no power but mostly have his father leadership and shield wielding skills.

Francis Barton/Hawkeye
The son of Hawkeye and Mockingbird who is only one that Stark didn't save as he wasn't aware of his existence. He have great archmanship skill just like his dad and have lots of unpredictable trick arrows.

Torunn Thorsdóttir
The daughter of Thor and Sif who is one of the most powerful member of the Next Avengers. As an Asgardian, she have the same powerful of her father but might be weak and have a sword that have electrokinesis and only she can lift it.

Azari
The son of Black Panther and Storm who is the sneakiest member of the Next Avengers. He inherited his father's cat-like abilities with the panther spirit and his mother mutant power of electricity which he can combine the two.

Henry Pym Jr.
The son of Giant Man and Wasp who is the smartest member of the Next Avengers. He have both of his parent genius intelligent and his mother mutated powers in which he can change his size from small to big and shoot energy stings.

Former Avengers
Tony Stark/Ironman
A founding and surviving member of the Avengers who raised the children away from Ultron for years. He rarely seen with his armored suit possibly because of his age and rarely use it during the 12 years gap.

Vision
Another surviving and founding member of the Avengers who serve as Tony's eyes and hears during Ultron's reign. He possessed phasing abilities and shoot energy from his forehead, he was possibly was created by Ultron in the past it actually due to his origin not mention but it a possibility.

New Members
Skaar
The 18 year old son of the Hulk and Caiera who lived on the planet Sakaar with his late mother and his late brother Hiro-Kala. He have many of his mother's skills and resemble his father except the hair and have his gamma power but have little experience. This my head canon Planet Hulk and Next Avengers are in the same continuity because Hulk doesn't have a child so I put Skaar in who appearance and personality is his Agent Of SMASH counterpart with traits of TMNT 2012 Bigfoot, Koda from PR Dino Charge, and Rustle from Up.

Laura Kinney/X-23
The 18 year old daughter/clone of Wolverine and Sarah Kinney who was raised by Wolves when she escape from Ultron in North Hampton. She have many of her father's abilities like a healing factor and have Adamantium-laced skeleton during experimentation. Wolverine is one of I'm favorite characters so I decided to let Laura appear which her appears is her appearance of her Marvel vs. Capcom 3.

Devil Dinosaur
A large and powerful red Tyrannosaurus Rex who lives in the Savage Lands which is the few places Ultron didn't conquer for the past years. It was tamed by Skaar as he mistaken it as a puppy due it mentality to listen to him along with aving it from Sauron, is a reference to Agent Of SMASH, it like Skaar is based on it TV show counterpart but also have behavior similar Kevin from Up.

Sentinel COTA-94/"Arnold"
A mutant hunter robot that is the last of the Sentinel created by Bolivar Trask until Ultron created superior version with power mimic abilities. He is responsible for the death of Wolverine and try to catch Laura until he was powered down and cover in mud, he was later found by the Next Avengers then continue his mission to find Laura which he ambush but Pym quickly reprogram him, he have the appearance of Sentinel from MvC3 and have traits of the Iron Giant, Terminator, and RoboCop.

Antagonists
Individuals
Ultron
An artificial intelligence created Tony Stark for peace until turn on the Avengers as he see them as the problem of Earth. Ultron return to serverely damage as he almost wipe out Sakaar and created Ultron Sentinels from their technology with most the Warbound and other survive, he later upgrade his body which he use Stark & Sakaar technology and forge Vibranium and Adamantium from his trophy room to make a new body based on his MvC: Infinite counterpart

Sentinel model DOFP-14/ Nimrod
The first of the new line of Sentinel based on the Sentinel from the film Days Of Future Past and the most advanced of his brothers. He possess more sentient and the ability to adapt to his opponent powers and have a rivalry with his predecessor and his older brother Arnold.

Infinite
A Mobian jackal who was leader of the Jackal Squad until Shadow destroy both them & Infinite's personality of his former self. Infinite is Cinos' #1 rival which he want revenge during war along with Sonic and the rookies of the Resistance during The War To Save The Planet. (which you guy called him Gadget or Buddy for the red wolf but not sure for the pink cat and the green bird).

Metal Sonic
A robotic counterpart of Sonic created by Eggman who is desire to be faster and stronger than his organic counterpart. Like Infinite, he too have a rivalry with both Sonic and Cinos to show them that he's the real Sonic, he's Eggman's greatest creation, and sayings that they the one who are copy of him.

Zavok
A Zeti who is the leader of group of Zeti called the Deadly Six which he was trained by his mentor and former leader Master Zik. Unlike the the previous two, he have no rivalry with both Sonic and Cinos but see them as threats due to the incident in Lost World.

Professor Cog
An Attack Bot created by Venjix in the future during the time of the RPM Rangers who came to the past to prevent the fall of the Venjix Virus. He hated the present but he can't go back go back into the future, he will either change history or taking over somewhere to continue his master legacy but founded Prince and Princess Archerina to make him part of the Machine Empire.

Steeljaw
A wolf-motif Decepticon who is the leader of his group of Decepticon and transform into a wolf snout-like off-road vehicle that was a prisoner from the Alchemor. He seek to find a way to make Earth a home world for all Decepticons to be free from the Autobots.

Foot Soldiers
Grinders
Foot soldiers that serve the Venjix Army led by King Mondo during the past of the Zeo Rangers.

Cogs
Foot soldiers that serve the Machine Empire led by Master Venjix in the future of the RPM Rangers.

Cyclobots
Foot soldiers that serve the Mutants led by Ransik & Frax during the past of the Time Force Rangers.

Badniks
Foot soldiers that serve the Eggman Empire led by Eggman and his henchmen threw out Sonic's adventures

Ultron Drones
Foot soldiers that serve and led by Ultron which he created during his time at Sakaar. They are based on their Contest Of Champion image.

Sentinels
Foot soldiers created by Bolivar Trask but then later and led by Ultron to take down every mutant. The old ones created by Bolivar Trask are based on MvC3 image while the new ones created by Ultron are based on X-Men: Days Of Future Past future version.