Heres my Idea for SpiderMan 4:

Cletus Cassady breaks in Doctor Connors' lab and steals the symbiote, while a mad scientist finds out Peter's secret and decides to clone him. Then, of course, Spider-Man battles Carnage and his clone and the clone decides to help Spidey defeat Carnage. He dons Peter's old wrestling Spider-Man Costume with a solid red proper Spider-Man Mask and becomes the Scarlet Spider. An epic battle with Carnage follows in which Carnage escapes and Peter finally gives his clone a different name. The name is:

"Ben Reilly Parker"

Of course this is a very breif plot. Now someone give me their idea for Spider-Man 4.