Glenn Howerton won’t confirm that he’ll be back on It’s Always Sunny in Philadelphia, but “it is POSSIBLE that he’ll come back”

Entertainment Weekly

“What I also said is that whether Dennis comes back or not has nothing to do with AP Bio,” Howerton said in a series of tweets Saturday morning. “They are 2 separate projects. It is a creative decision that Rob, Charlie and I have to make once the writing process starts, which it hasn’t yet.” He adds: “Telling you whether or not Dennis is coming back would be giving away the plot of the next season.”