AJ Mclean to voice a character on the show.

[Kallo]

Fuli wouldn't make much sense. It'll likely be Kiara. Though, I guess it could also be Jasiri, even though she isn't a real main character per se.

Could also be someone completely new, that's just a "main character" within the episode itself.

[SimbasGuard]

If the rumors (yes I said rumors so I know that pretty much invalidates what I am about to suggest). of this Mole character not appearing until Season 3 are true. The character in question could be Rani (I doubt it), but maybe if she were seemingly alone and did not have to put on a brave face for her Pride. She might be able to admit that she actually has some fears and may even be able to deal with them instead of suppressing them.

Of course now that I have said this. The next new episode we get will be this one.