Aintitcool posted a news item today where Avi Arad, head of Marvel Studios, said they are mulling over doing a grey hulk instead of green. Hulk was grey in his original incarnation in the comics, and there was a great run of comics in the 80's where the Hulk turned grey after Banner started abusing drugs. He became a Vegas bouncer type called Mr. Fixit. That'd be a kick to see for a geek like me, but I wonder what the general public will say.