Wonder Woman's probably made me the giddiest, mostly because we hadn't seen her done justice in live-action before, and because I wasn't expecting to see this much of the classic costume integrated (Tiara? No straps? New 52 torso? Eagle? Trunks? W belt? Lasso? Nice). I also love how Gal looks in it. That being said, I'll have to see what it look like in the trailers for final judgement on how they color grade it.
The Batman costume, on the other hand, is just utter perfection, and every-time I see that crisp well-shot photo (with no CG backdrop) I always find myself pausing to admire for a bit. The cowl, the two-tone color, the texture, the symbol are just all so cool. The slick rain-soaked batmobile doesn't hurt either.