Okay so you know how baby yoda, I am sorry Groguru summond a jedi well I think I might know who it is.
But first let me tell you who I think its not-
1- Luke Skywalker,
Its not Luke okay.
2- Mace Windu
It would of come out that Mace Windu would be on season 2 but it hasnt its only a theory so its not going to be him. Also Star Wars has brought to many characters back to life so yeah.
Okay so now for my theory.
I think it COULD (key word is could) be Ezra. I am not sure but i hope it is. Ezra has always been a favorite of mine. He is like the luke we never had, butttttttttt there has been so much happening in season 2 with Bobo fett (I spelled that wrong i know, I meant to), Ahsoka, bo katan, and thrawn, so it would be a lot if ezra came back. Since he is floating in space with mah man thrawn and space whales so no one really knows where he is but ahsoka and sabine are looking for him the next episode could have sabine in it, Idk. Anyways this may not be idk. I just really want to know what happens to ezra :)