You'll be able to find a great deal of information on this exhibit which runs until Sept 1st. I saw the E! coverage and then looked through the USA Today photo gallery which gives you a nice look at the celebs in their "comic themed" formal wear.
I'm hoping to get to this. Based on the news coverage I saw, there didn't seem to be much that actually looked like superhero stuff other than DC's Trinity display and a Catwoman display. The E! coverage yesterday of the previous night's gala showed a lot of celebrities in gowns "inspired by superheroes" and I honestly didn't much connection with really using my imagination.
The best imo was Christina Ricci in a Wonder Woman style suit under a pale pink chiffon overlay. Fergie was in a black gown with a cheetah brooch on her shoulder which I'm guessing could pass for a Catwoman theme. Katie Holmes was wearing a red gown with blue shoes. Victoria Beckham could pass for an Emma Frost influenced in her white coat style gown if you really stretch your imagination. Naomi Watts was in an all white gown sort of Roman style which had a nice size metallic star on her belly. As for the men, Zac Posen in a shiny purple suit is really the only that looks like something other than a Bruce Wayne formal black tux.
Kate Bosworth, Kimora Lee Simmons and designer Diane von Furstenberg all looked like comic books threw up on them. Vogue editor and the event's organizer Anna Wintour claims to have looked to X-Men's Storm for her gown but to me it looks more like Tina Turner in Mad Max Beyond Thunderdome. Venus Williams had this massive red cape over her gown which looked ridiculous.
http://www.usatoday.com/life/gallery/day/flash.htm?gid=56&aid=2494