Now, as I stated so emphatically, I do believe a villain could carry his own movie. (After watching Dr. Horrible's Sing-a-Long Blog, I'm even more convinced.) But Venom? Seriously? It's not even a character in the strictest sense of the word. It's a ... symbiote! (In the Ultimate Universe, it wasn't even that much, it was just a suit.) It just bonds to people and makes them do really bad things. How can you make a movie about a parasite? Will they give it the sympathetic angle of a lonely and silent creature who just wants to make some friends?
While Sony and Marvel have yet to comment, the studio has hired Jacob Estes to write a draft, and they're eying potential cast members. Topher Grace won't be reprising his role from Spider-Man 3, as they're not convinced he can carry a big budget picture. They should be more worried about a symbiote carrying a tentpole picture, but that's just me. Maybe the Spider-Man fans out there feel differently -- in fact, I know some must, because of the dozens of Venom T-shirts I've seen in my lifetime. Is Venom the character you want flying the Spider-Man banner?