This isn't the first time Game Freak has called a new form of an older pokemon a new pokemon. It could still just be a mewtwo form. I mean, what reason would Nintendo have to make a mewthree.... Besides, isn't the tail end of the new movie "Mewtwo's Awakening"? He wasn't dormant all that time. He was just underground like the hipster he is. The only way it could be a new pokemon would be if Mewtwo were to evolve.... And that'd just be kinda odd, no? So don't count out it being a new form just yet. It could still be just that, with Game Freak tryin to get us off the trail.