Yes, this is no joke, and I am sure that the whole of Geek-verse is in shock and filled with mixed feelings over this news. I usually keep my aggressive violent psychopath-like tendencies under check (finally got the hang of that), however, this news calls for a break of all restraints.
Ben Affleck is alright, and he did a brilliant job with Argo, however, I am not sure that he can pull off playing the glorious and invincible superhero who makes the Avengers like a pack of tame choir boys, AKA the Batman. Lets see how its going to play out, there are still a couple of years for the movie to hit the theaters, maybe we can learn cope with this by then. Christian Bale, we will miss you, quite terribly.