Pineapple Express/Superbad crossover?

We're a little low on Pineapple Express coverage, so here's this: In an interview with MTV, the film's James Franco let slip that a proposed sequel to Superbad might be a crossover with Pineapple Express. Says Franco, the idea is being "kicked around," and that it might be a collaborative process between Greg Mottola and David Gordon Green, directors of the original two films.