MCU fans have taken to X/Twitter to put forward a theory about the Marvel star's return, as well as explaining why it's a bad idea.

So it remains unclear if Evans, who starred as Captain America Steve Rogers and made brief appearances as that character in several MCU films, will reprise that role or take on a new one in "Avengers: Doomsday," due in theaters in May 2026.

Chris Evans is set to return to the MCU in Avengers: Doomsday, sparking mixed reactions among fans. Marvel's decision to bring back original actors raises concerns about the franchise's ability to move forward. MCU's reliance on old actors like Evans and Downey Jr. may hinder the success of introducing new characters.