MCU will stall unless it leans into actors aging. Move older heroes into mentor roles and younger into active. Comics have never been able to do that for whatever reason. It's reboot, retcon, and aging up. Which I think turns hardcore fans into casual ones.
GamesRadar+Kevin Feige says Avengers: Doomsday and Secret Wars will set up a "streamlined, simplified, single universe" that could last through 2042 www.gamesradar.com/entertainmen...