Ay, the only ones that appeared new were the 1990 Cavaliers jerseys. I think there was a version of them included last year, but not exactly the same. Otherwise, they all appear to match the choices provided last season.
They knocked off 90% of my requests on my 2K11 wishlist, so I guess "even more retro's" can get bumped up toward the top of my 2K12 list.