I'm (like Spencer) a MASSIVE Batman fan. I really hope they revamp the simulator to give it a Chris Nolan workover. If they turn it into the lame kiddy batman animation deal I'm not going to be happy - that would be even worse than what they had for BA2 (and that's really saying something...). It *could* be something in line with the new justice league movie like Wyncerous was saying, but it's going to be opening in two months, and the movie isn't out, so that moots that idea.
To be honest, I'm going to be super disappointed if they get rid of the dark rides/dark ride hybrid. I agree with what others are saying, that the atmosphere of a dark ride can not be matched. Atlantis or neverending story would be freaking amazeballs, I just can't see it happening. Imagine if they replaced LTRR with Alice in Wonderland, not going to happen - still, it'd be rad to go hunting for the chesire cat down the river.