Originally this post had a image of a Mega Mew in it.
Due to my own excitement over my favorite Pokemon not only being in the next game, but also having a Mega form, I didn't double check my sources (images from Japanese magazines and the next movie that all may in fact be fakes) to find out that the image might be a fake. I'm sorry for not approaching this with the healthy amount of paranoia I should have and letting my own excitement get the better of me.
I'll try to avoid making useless post like that one again.
Here is a link to the (possibly fake) Mega Mew design if anyone still wants to see it:http://i.imgur.com/lAxfPTT.jpg