I liked Bale in the Nolan trilogy, but I really, really don't think it'd do any good if starred in the new movies as well. One, the new movies will focus more on comic Batman, and I think Bale needs something to get there, physical. Not that I bodybuilder, but something halfway between Bale and Millar's TDKR Batman (who was way too huge). It'd also be extremely difficult for WB to sell the idea that this is a different Batman to the common people. They'd think that this was a continuation of Nolan's movies.
I like Nolan's movies, but they're *not* the 'real' Batman. I want to see comics Batman on the big screen!