Long story short — a trio of Black & White starter evolution pictures that originated on 2ch picked up steam as a legitimate rumour. Following the “scoop,” a number of trusted Pokémon sites on the net got on the case, and have been trying to verify it, all in their own ways, and most are of the opinion that these are indeed the evolved forms of Pokémon Black & White’s starters.
Keep in mind, there’s a chance they could all be wrong. But in the event they aren’t, here’s what you can look forward to:
[Sources: Serebii, Pokebeach]