I would change things a bit on Hobgoblin, Carnage is awsome, Morbius looks like he is from Ann Rice's wet dream, Lizard and Vulture are phenominal, Shocker and Scorpion needs work on their costumes, I think I would stick with Kingpin from Dareddevil, Venom I would keep, Sandman looks like the comics, Doc Oc, Green Goblin, Goblin 2, would change a little bit on the costumes, Kraven is right on the costume, Mysterio's costume needs a bit of work but looks like it could work, Rhino might work in that costume, Electro looks sleek but I miss the mask, Bulls Eye would keep, I would get a different character for Hydroman, Rock could diffinently be Tombstome, Chameleon could work but give a different costume he looks like a bum, Hammer Head is dead on.
Thats just my opinion.