I've updated my roster with the new character reveals!
Totally didn't expect Greninja. I figured Mega Evolutions would be enough X and Y representation... I'm still kinda sour about Pokémon Trainer being cut, and Charizard and Greninja by themselves still feels odd to me (I view starter Pokémon as a set, as they were portrayed in Brawl under Pokémon Trainer), but I'm warming up to it.
With Sheik's reveal as a separate character, I removed Impa. Also, I added Chrom and a Rhythm Heaven character to be in line with the recent rumor. If it really is from the same source that leaked Villager, Mega Man, Wii Fit Trainer, Little Mac, Mii, and Pac-Man, then I think it's believable. Time will tell, I suppose. They got Greninja right, after all. Though Greninja wasn't specified, since they only said "Pokémon from Pokémon X and Y," and while that sounds fake, I can imagine someone with inside information who may not be very familiar with Pokémon saying that if he doesn't have access to the official character names (remember, the same source called Villager "Animal Crossing Guy" prior to E3).