Well this whole movie is going to be one of those wait-and-see things. Gal as Wonder Woman and Ben Affleck as Batman... On paper it sounds like a recipe for a box office disaster, but I'm going to reserve full judgement until I actually see the film.
As for the outfit, it's surprisingly tamer than the New 52 variant...
Keep in mind that it seems like they're trying to modernize everyone's outfits. Superman's suit is far from the original design, and it appears Batman's has been modified quite a bit as well. It would seem a little silly to modify those character's outfits and leave Wonder Woman's the same. Like it or hate it, Nolan had a huge effect on the super hero genre by changing from cartoonish campy to dark and gritty, and it seems like all the outfits being designed for comic book films are following the same sort of style, regardless of if the movie they're in is light or dark.