This is probably even more harder to decipher the Mr. XY! Personally, I think it looks good. The red eyes and head rings are nice touches. But dat head-tail 0_o. Please just be a glorified version of the tube on the back of Normal Mewtwo, and not its tail. We do see a bit of the regular tail, so perhaps I'm right? I hope I am 0_o. And remember folks, we haven't seen a proper version (Sumigori Art) yet. The anime f*cks things up. And that's if it is real.
I hope if it's real it has a really cool feature Mewtwo hasn't got. Psychic/Fighting anyone? Between Psystrike and Aura Sphere/Focus Miss, Blissey has its work cut out for it.
Between the title-Mewtwo's Reawakening, the empty hexagons Shine pointed out and the text saying something like 'You don't know the real Mewtwo yet', I think Mewtwo will get another forme or something, even if this is fake.