I noticed hints at some ships already in Thunder and Shadow, so...
Here.

Tigerheart and Dovewing... Tiger is no longer interested... at all. Sorry, Tigerwing shippers. Dove still likes him though. *awkard*

Ivysong has almost sailed! Just gotta pull up the sails! They went hunting together, and both seemed quite enthusiastic about it.  (BUT IVYWHISKER)

I caught Rosepetal and Mousewhisker (?or Molewhisker) chatting together in the warriors' den... (BUT IVYWHISKER...
Hopefully it was Molewhisker...)

Thornclaw and Blossomfall haven't even interacted yet, that I saw so far.

Needlepaw was uneasy when she met with Alderpaw with the two kits (for playtime). It was later revealed that she was meeting the rogues, and Alderpaw noted that she seemed odd, different and uncomfortable. I don't really doubt that this will happen. It's been hinted at a bit... hopefully just friends? Yeah... no...

Bumblestripe hardly was there... still not sure.