Take a look at this early concept art of Spidey's costume and the design for The Lizard from The Aaron Sims Company and Eddie Yang Studio. I dig the "web wings" on the last design, but I'm glad they chose what they did. The first one looks like a looser-fiting version of the Raimi-era suit. However, I do prefer this Lizard concept to the final version - I like the lab coat and I think he looks scarier.
Also, check out more concept art from George Hull Design (spoiler warning if you haven't seen the movie yet)