Danny DeVito tells The A.V. Club that a new season of It’s Always Sunny is filming this winter
There's still no word on if that season will be the last one, though

Danny DeVito Photo: The A.V. Club
Charlie Day said in an appearance on the Smartless podcast earlier this year that he doesn’t think It’s Always Sunny In Philadelphia will run for much longer, teasing that season 16—the show had just finished airing its 15th season at the time—could be the show’s last. Speaking with The A.V. Club recently, It’s Always Sunny’s Danny DeVito went a half-step further by teasing not only that a 16th season will happen, but that it will begin filming within a few months.