I still think this man has the intensity and subtlety to nail this role. The only concern is the voice and if he wants the role above Luke Skywalker's son. I really don't think the voice will be the problem that people think it's gonna be though....
I just watched Batman (89) on the glorious Blu-ray for the first time. And this whole movie, Keaton is just not even close to how Bruce Wayne looks. And most of the time it's not how he acts either, until the endish where he starts really feeling more like Wayne, like he's digging into it more. But regardless of that, Keaton does it all brilliantly. He was great. He was an out of the box choice. When he put on the cowl he surprised everyone.
This is how I feel about Gosling but kind of the other way around. He doesn't scream Bruce Wayne in looks but I think his build and some hair dye would make him look more like Wayne than Keaton did. Then you have the playboy billionaire. Keaton played it awkward, Gosling would play it just as well as Bale did (check Crazy Stupid Love).
Then there's brooding Bruce. Check his Refn films (Drive, Only God Forgives). Done.
Now, Batman. Nobody thought Keaton could do it. But he always had intensity. Those eyes. Great actor. And he did it. Gosling has that down. He has dynamics which is needed to play a 3 sided character.
Voice? The quieter batman is, the better. Gosling raised his voice higher in Gangster Squad, if he can do that, he can sure as hell lower it a notch or two when he speaks under the cowl.
The casting will be about the screentest, availability in one's schedule, stardom (maybe, depending on what they want), age (between 29 and 34 seems to be the range), intensity as an actor with range.
It's never been about a guy walking into a room built like an ox or having the perfect voice from the cartoon. Actors can work on those things later. Gosling falls under all the categories I listed, but if his schedule is not open or the screentest doesn't work then there's a few other actors who are just as good.
Im just saying, don't underestimate the Gos!
This post is mainly for people who keep doubting him as the Batman.