I'm really against the idea of someone else playing Batman besides Bale, but if its Gosling, I just might be able to live with it. Gosling's work in Half Nelson made me think I was watching a new DeNiro emerging onto the hollywood playing field. I know some people didn't like Half Nelson, but god, Gosling really impressed the hell out of me.
I'm not trying to be offensive Caboose, but in my opinion, this couldn't be further from the truth. Honestly I don't think he looks much like Bale, and I'm really glad that he doesn't. If George Miller is worth his salt, which I think he is, he will not make Gosling model his Batman after Bale's. Don't get me wrong, I absolutely love Bale's Batman, I think its probably the best on screen. But Gosling is not Bale, just like Roger Moore is not Sean Connery. Different people have to bring their own character to the role, or you get what I felt was a problem with Superman Returns, with Routh channeling Christopher Reeve.
Gosling, while not a movie star, has become a highly respected actor, and he really deserves that respect. If he somehow lands the Batman role, we are all really really lucky.