Last year, Marvel Studios announced that “ Avengers: Endgame ” would get a theatrical re-release ahead of the next superhero team-up movie, December’s “ Avengers: Doomsday .” Turns out, there’s more to the “Endgame” than previously advertised. During the Walt Disney Studios presentation at CinemaCon on Thursday, directors Joe and Anthony Russo announced that the Sept. 25 release will include brand new footage from the already 3-hour-long movie. Plus, both “Endgame” and “Doomdsay,” in theaters