Godzilla & Mothra made it to their meeting point in Volcano.

Godzilla: Mothra, Why are we in Volcano?
Mothra: Because he lives there, Godzilla.
Godzilla: That makes sense.
Mothra: Oh, There he is.

They felt shaking until the volcano exploded.

Godzilla: Whoa, What the Hell?
Mothra: Yes, it's him alright.

they witness the volcano eruption but something is coming out, the claws and its wings rose as the lava flowed down. It was Rodan, The Fire Demon. Rodan burst out of the Volcano Roaring. Spreading his wings as he is about to dive and to fly.

Godzilla: What's your name?
Rodan: The name's Rodan and you are?
Godzilla: I'm Godzilla by the way.
Rodan: Hello, Godzilla, I'm so glad that I finally met up with you.
Godzilla: Yeah, Rodan but, Mothra, Do you anything else?
Mothra: No, We'll hang out sometimes.
Rodan: Don't forget me, bro.
Godzilla: Alright, Let's get going.

And with that, They hang out with their lifetime friends.

Ei: Hello and who are your new friends?
Godzilla: This is Mothra and That's Rodan.
Rodan: Hello, ladies.
Godzilla: Rodan! Don't talk to them like that
Rodan: Oh, right. Sorry.
Godzilla: So, What are you planning about.
Ei: Sorry, I have some urgent immediately.
Kaga: So did I and my sisters.
Zuikaku: Me too.
Mothra: Okay, enjoy some urgent or something.
Rodan: Good luck.
Godzilla: Alright have a good day, because I have some urgent after this.
Ei: you too.

Then they went to their urgent stuff while Godzilla and his friends are hanging out then he introduced them to Kong which is nice to them Godzilla and Kong explained about their rivalry and Mothra told them to be friends which they agreed and they made their own team called Kaiju Defenders and Godzilla became their leader.

Meanwhile

Cinder and her friends are plotting something.

Cinder: We need to find him and fast.
Emerald: I know the location.
Neo *text*: Where?
Emerald: Inazuma.

Somewhere in space

The three-headed dragon is known as Ghidorah flying towards Remnant.

Ghidorah: We're coming for you, Gojira.

Ghidorah was planning to fight Godzilla.