http://www.comicbookresources.com/?page=article&id=18183 Apparentally he might work on season 5, but it's too early to tell.
Excellent! Anyone know if Gatiss might return as well at some point? The Idiot Lantern wasn't brilliant, but I liked the Unquiet Dead.
Gatiss had a WWII story in the running for Season 4, script written and everything, but RTD pulled the plug on it at the last minute.