Is Brainchild the villian for X-men Days of Future Past

I was looking at the cast and peter dinklage is cast as a villian on certain sites but my question is that if he is indeed playing that role, the only villian i could see is brainchild because of mr dinklage's dwarf size but how would he fit in the story for future past when that character is only in the savage land stories.

Brainchild isn't always a midget is he? I have seen pictures where he looks normal just with a big ol head.

That would be a real weird shock? Maybe Ahab? If this movie is going to have a main villain it should be Nimrod. The original Nimrod.