Several outlets are providing guides on which movies to watch before a movie titled Avengers: Doomsday, with some focusing specifically on X-Men films. The recommended viewing lists vary, with some including only X-Men movies and others suggesting a broader range of marvel movies and tv shows. It appears that there are multiple possible viewing paths to prepare for Avengers: Doomsday, but the exact number and titles of necessary films and shows are not universally agreed upon.