Great work, the Catwoman and Robin are stand-out good gestures. My own person preference, but I'd rather you draw a fast crappy background than use a filtered building photo. Tell me if I'm over stepping there.
"WAAaaaay more complicated than it has to be." Hello, New52
As for the detail, that's where artistic license comes in, cut pieces and parts out till you're at a place that says the same thing, but has less of the work. Games and movies (especially with HD) really demand textures, seams, etc. Alot of costumes, from batman to captain america and ironman deliberately add details/textures for the camera to capture, rather than flat spandex, or coloured garb (why we'll never see a classic batman or spiderman outfit). Probably found out through focus groups viewers are bored of flat coloured surfaces... lol. There's actually some real science behind it, I'm sure one of the more in-the-industry people that used to hang around here could go more into the depths of the whys.
(you probably knew all that, hope I don't sound like a know-it-all
Haven't played Arkham yet. It and Zelda are waiting in the wings for me till I get some time sensitive projects outta the way.