Searxng/Game of Thrones The Mad K TV Get ready for 2026: George R.R. Martin reveals new details on the Game of Thrones stage play, The Mad King, exploring the Mad King's reign. May 12, 2026 AceShowbiz - Game of Thrones is expanding its universe in 2026 with a major new prequel: a stage play titled Game of Thrones: The Mad King. Creator George R.R. Martin recently shared an exciting update about this upcoming production that delves into a pivotal chapter of Westerosi history. 2026 is shaping up to be a landmark year for the Game of Thrones franchise.