If "Man of Steel" fails expect the Batman reboot(with Nolan producing?) to be greenlit in a second.
It will be more Batman movie for the foreseeable future for DC
No doubt very likely true.
Which raises the question: At what point, even for Batman, does saturation via turnover begin to set in for the film franchise?
Amazing Spider-man isn't on a path to do the same type domestic money as the prior films. Superman Returns, as a soft reboot was a non-starter despite the years away.
How drastic of a take will the next Batman have to be in order so seem "must see"? IMO, the take should be Batman Beyond.