A great disturbance in the Internet
But fret not, fellow nerds. Ben will be fine. Look at this history of Batman for proof:
As for Ben, he'll do fine. I worry about the overall focus of the movie (Superman and Batman) far more. I really enjoyed the new Superman movie and am disappointed it's not getting its own sequel, rather than sharing one with not just Batman, but a new Batman. Don't blame Ben. Blame D.C..
In the meantime, imagine the Batman of your dreams and how Affleck will ruin it for you.