Avengers: Endgame is heading back to theaters with a special new edition featuring some new footage. Billed with the addition of Encore in the title, the Russo brothers have teased that it will feature some essential extra details that will help set up Avengers: Doomsday. It's been confirmed that four minutes of added footage will make it into the film, as well as there being a special additional tease for fans watching in IMAX and Infinity Vision. Posting on Reddit, one suggested: "I'm 95% certain that the extended runtime is literally just 4 minutes of a sneak peek of Doomsday tacked on at the end of the credits.
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GamesRadar