According to director Kevin Smith, the new costume will be totally different from anything that fans have ever seen in previous Batman movies. Here's what Smith told Hollywood Babble-On in a podcast:
I saw the costume, more than that I saw him [Ben Affleck] in the costume…I don't want to give anything away cause that is up to them and stuff, but I am going to say this…I instantly bear hugged him. You have not seen this costume in film before. Because every other movie has done this matrixy black armor thing…There wasn't a single nipple on this [frick]ing suit man. I think everyone is gonna be like 'Holy Shit!' We haven't been down this path before. Even the Hardest core "[frick] this movie" person will be like 'alright, I'm ready!

It seemed like it was very [Redacted] Influenced.
So is this supposed to be a good thing? We're still reeling from the fact that Affleck was picked to play Batman. We're just crossing our fingers and hoping that whatever the costume department ends up putting on Affleck doesn't end up looking ridiculous.

[Nerd Bastards]