his Batman was perfect for the universe Nolan build, which was attempting to be much more grounded and realistic. He needed to be a Batman that could conceivably die at any moment for that story to work. Hell he was only Batman in that universe for a couple of years and it almost killed him. Battfleck is going to be much closer to the near-superhuman Batman interpretation you see in a lot of comics. He has to be able to credibly hold his own with Superman and Wonder Woman. Bale-man could not have done that. They each work in their own ways.