FXX has released the official trailer for Season 14 of its beloved comedy It's Always Sunny in Philadelphia, which returns on Sept. 25. Once again, the Gang is all here, from Mac (Rob McElhenny) and Charlie (Charlie Day) to Dennis (Glenn Howerton) and Sweet Dee (Kaitlin Olson), as well as Frank (Danny DeVito). The eccentric friends hang out at their bar, Paddy's Pub, where they get into all kinds of deplorable shenanigans. [caption id="attachment_728224" align="alignright" width="360"] Image via FX[/caption] Season 13 ended with Mac finally coming out of the closet in what was the …