If the ever make a sequel, they should make a few guys from the Avengers as Allies. Wouldn't it be awesome to have The Hulk, Iron Man or Captain America at your side? And if Carnage is the villain, then Venom should be your ally, too at a certain point in the story, because you both need eachothers help to defeat Carnage. The Kingpin should be involved again and other villains like Green Goblin and Doc Ock should be involved, too.