My main problem with some of the costumes, and not just this one, is that the comic versions that everyone loves don't necessarily work in the real world. Not only do they not always look good, Wonder Woman, but they don't seem practical.
Wolverine in his yellow/blue/black outfit is classic, but I'm going to be honest, the leather outfit from the X-Men films was way more badass for the real world. The Captain America outfit from the film? Liked it much better than the tights version we're getting in Avengers (at least based on the promo photos).
There are outfits that I like in the comics but when you think about what a superhero would wear in the real world in 2011 there's a big difference. Someone not bulletproof, like Batman, is going to use rip-stop, puncture resistant and bulletproof material wherever possible, not go to Jo-Ann Fabrics and buy a bunch of spandex. The only exception I can think of to this is Spider-Man. I think the spandex look from the films worked.
If you look at the WW costumes pictured here, I like the idea of the leather top from the Smallville appearance, but not the actual design or the Xena skirt. I don't mind the pants from the WW show/cameo but hate the top. Some combo of the two would probably be where I'd like to see the costume go.