At Comic Con, Judd Apatow joked about a possible Pineapple Express / Superbad crossover movie, where the paths of all the characters would cross. Everyone thought it was just a joke. Besides, Seth Rogen has expressed his disinterest in doing another Superbad, even though the movie studio has been clamoring for a college tale.

This week our friends at MTV talked with Pineapple Express star James Franco, who told them it’s a real idea. But it gets even weirder. According to Franco, part of the idea for the “unprecedented crossover” is that it could be filmed by two directors, Greg Motolla and David Gordon Green, each directing half of the movie. Even Franco admits that it “doesn’t make sense at all, but could work.” I’m not sure the Directors Guild of America would allow it.

The idea of the crossover became hot in Hollywood when Nick Fury showed up in Iron Man and Tony Stark made an appearance in The Incredible Hulk. But truth is, Kevin Smith created the ultimate crossover movie years ago with Jay and Silent Bob Strike Back, which included the characters from every Kevin Smith film at that time. And since Smith, like Apatow, uses the same crew on many films, some of the actors appeared as a couple different characters. For instance, Jason Lee appeared as both Brodie Bruce from Mallrats and Banky Edwards from Chasing Amy.

And with a Pineapple Express / Superbad crossover, thee would be a huge conflict as Seth Rogen appears in both films in major roles. Franco’s idea is to kill one of the characters off, soyou don’t have to deal with it. I think the funnier thing would to be having Seth Rogen, as the cop from Superbad, chasing Seth Rogen as the stoner from Pineapple, down the street. LOL. Yeah, I doubt this will ever happen. I think I’d actually rather see Seth, Evan and Fogell go to college.

Discuss: Would you rather see a Crossover movie or a Superbad sequel?