Rob McElhenney and Ryan Reynolds debuted the first promo for “Welcome to Wrexham,” their upcoming FX docuseries about buying a Welsh football team together, on Wednesday. The video also happened to be a plug for McElhenney’s long-running FXX comedy “It’s Always Sunny in Philadelphia,” a point Reynolds was apparently not made aware of in advance.The clip, which you can view above, begins with the “Always Sunny” theme music playing outside a pub in Wrexham, Wales.