It reminds me of Deoxys. With its Defence form, attack form etc. That was just kind of silly.
(Gasp.) Bite your tongue!
Anyway, I can't get this thought out of my head, and I think it's a pretty cool thought, so I'll share it with all of the three people who will read this:
Assume that through years of training and meditating and whatnot, Mewtwo has achieved the unthinkable as a Legendary: evolving. Say this evolution (the new Pokémon that was recently revealed) was revealed to be called "Mewthree." Sure, all of this is highly unlikely, with it probably just being a Speed-enhanced Forme (Rapid Forme, Awakened Forme, French-for-"lightning" Forme, whatever...), but stop and think for a second about this possibility, all of you older fans. How insanely cool and mind-blowing would it be to, after all of these years, find out that the playground rumors that Mewtwo can somehow evolve into Mewthree were actually true?! I don't know about you all, but the thought that there is a very slight chance that this is the case just brings a smile to my face. Hopefully you enjoy the thought, as well.
On a more realistic note, I hope that this new Forme of Mewtwo's is slower than Deoxys Speed Forme. I mean, come on, that Forme is called "Speed Forme" for a reason! I personally feel that that particular Forme of Deoxys should forever remain the fastest Pokémon (assuming that Arceus isn't already faster; I can't remember for sure.). Plus, I just like having that fact to brag about as a reason why Deoxys is better than Mewtwo. Obviously this means that GAME FREAK and Creatures should do it the way I want, end of story.