Stunfisk is showing up and we did get Palpitoad's VA, so I really hope we get to see Palpitoad AND Tranquill, for one because we haven't seen much of either, and also because I'd like to see the writers not stick to Pikachu, the starters, and Scraggy and one spot for rotation.
Well the preview that Playerking noted (likely the Pokemon Smash preview), has said that Juniper is recording Archen's interaction with the group's Pokemon. Of the possible options:
Ash: Pikachu, Tranquill, Oshawott, Swadloon, Palpitoad, Roggenrola, Snivy
Tepig, and Scraggy apparently aren't listed, and I listed seven so take out Swadloon (I was going to say Roggenrola, but then I just remembered it was in the BW038).
Ash may very well have: Pikachu, Tranquill Oshawott, Snivy, Palpitoad and Roggenrola.
Iris: Axew, Excadrill, and Emolga
Cilan: Dwebble and Stunfisk? I didn't see Pansage but I'm sure it has a chance.
If I'm wrong please correct me, it's hard to reach the translated VA list when the roles aren't listed by categories. Pokemon for one category and humans for another.
Anyway if I'm right it looks like Tepig and Scraggy were rotated out, since it doesn't look like their VA's were listed.