I've never understood DC's decision for a large, physically-imposing Batman. In the comics, he's listed as 210 pounds (95.5 kg), so he would be a pretty big guy since he's supposed to have a very solid body. People underestimate what that would look like because we're used to seeing average or even fat bodies, which are not that big at 210 pounds.
Go to a gym and find someone who is a SOLID 210, and I guarantee he will have broad shoulders, heavy legs and/or a thick chest. He would not necessarily look like a bodybuilder, but he would definitely be thick. Now can you imagine someone like that trying to swing from rooftop to rooftop or even doing simple cartwheels, rolls and spins as part of their martial arts? Even if they could do that, they'd be out of breath very fast. There is a reason why Heavyweight class fighters gas out (i.e. fatigue) fast in fights, but they are also exciting to watch because of their knockout power.
As for Ben Affleck, well, he's also between 6'3" and 6'4", so he's even bigger than Henry Cavill, who plays Superman. It might look a bit odd if Batman is literally looking DOWN at Superman.
Personally I think Batman SHOULD look down on Superman.
why? Because Batmans power and strength and speed comes not from his alien DNA, but by his frame, muscles, and size. So it makes sense for Batman to be bigger. Im sorry, but Bale was WAY too small as Batman, not only is he way to short, but I could one-hand any punch he threw at me, and that is wrong.
As for speed and endurance, those MMA fighters have some great endurance. So do these offensive linemen who are 100 pounds heavier and 5 inches taller than Batman. So add that with Bruces training and supplements and its moderately realistic. Moderately.
But yeah, I weigh 183, and a people ALWAYS guess my weight wrong, nobody knows what people who lift weigh.
I cant wait to see what Affleck [who will have like 6-7 months to workout with the best trainers in the world with the best supplements using the Human Growth Hormone ] will look like in the movie. 6 foot 3 or 4, and huge, and he looks GREAT in the cowl. Im excited.
[also, Wonder Woman should be at the same height as Superman, as shes only a few inches shorter and her heals are at least a few inches]
They could have Cavill wear platform shoes. Hugh Jackman and James Marsden are both 6'2" and in the X-men films they had Marsden wear platform shoes to make him look taller.
And they're always finding ways to make Tom Cruise look taller in his movies.
James Marsden is NOT 6 foot 2, hes a few inches shorter than I am. Hes like average height.