Re: Does this movie have too many characters?
No, most of them will probably be canon fodder. Only 6 or 7 characters out of the announced casting will have important roles, if that many.
Whoever Dinklage is playing (the main antagonist)
I have my doubts as to whether or not Mystique will actually play a significant part in the film and I'm only putting Blink there because I'm assuming she will be their source for timetravel.