This would now be the third time I've heard this casting choice. Don't know much about Caan other than him being Sonny's son - must watch out for this guy.
I am sure like most who suggest him, what first attracted me to him for the role, was his size, he's a short guy(5'5" about as close to wolverine from the comics height wise as your going to get) and, usually in great shape (and not just for his size) the guys pretty jacked
but, he's got some talent, too, though
probably best known for his work in the, oceans(11-13) movies
but, if your looking for a decent, show case, movie for his guy, I'd actually recommend some of his lesser known (under ground, indie) work...
Like, Brooklyn Rules, (it's a 80's set, mob-ish flick, following 3 Brooklyn boys into there adulthood) if you can stomach Freddie's (Prinze Jr.) fake Brooklyn accent (I wouldn't be shy with the fast-forward with most of his scenes lol) but, Caan delivers a pretty solid preference