Fans of the NBC sitcom Community may not have to wait very much longer for the debut of season five. Because the network’s new sitcom Welcome to the Family is tanking in the ratings, NBC could decide to pull the plug and need to fill the time slot with something on very short notice. Community showrunner Dan Harmon posted on Reddit that if that happened, “we can hook em up in a few weeks.” Greendale Community College, here we come …