Ok, so I'm just going to add some villains on here, sorry if there's others you wanted as villains... Also, some might be villains only for a few chapters, then switch sides, keep that in mind.

Black Cat

Johnny Bolt

Kasey Anne

Doc Oct

Electro

Shocker

Mr Negative

Lizard

Green Goblin

Along with a few others I'll keep hidden for now.

What did you think of the list?