If Warner has already established that the DCEU universe includes several Earths, evidenced by the next film Batman which will take place on Earth-2, the MCU had until today never really confirmed on which planet the adventures of the Avengers took place on the big screen. It is now done since the producer, Nate Moore, revealed during an interview with The Ringer-Verse Podcast that the Maison des Idées films and series have always taken the Earth as a backdrop 616. More precisely, the producer first returned to the disappearance of Chadwick Boseman and the challenge that the production of Black Panther 2.
On the occasion of this explanation, Nate Moore referred to the traditional Earth 616 by saying: “You won’t see T’Challa in the MCU 616 universe. We couldn’t. When Chadwick Boseman passed away, we had a real conversation with Ryan Coogler about what to do next. It was a pretty quick conversation because we were like ‘we have to figure out how to move this franchise forward without this character.’ ” It is true that the disappearance of the interpreter of T’Challa necessarily pushed Marvel studios to question the future of the superhero on the big screen. The House of Ideas was quick to assure that she would not replace Chadwick Boseman in the MCU. Nevertheless, Nate Moore’s evocation of Earth 616 assumes that the character could reappear in other alternate realities, given the arrival of the Multiverse or the renewal of What If ?, series Disney+, for a season 2
Regarding Earth 616, you should know that the creators of the Marvel comics rarely refer to this world, the only side universes being that of the Ultimates as well as the SpiderVerse. So while Nate Moore cites the MCU 616 universe, the latter actually looks more like his own universe outside of the comics, as it operates on its own creative choices, removing and altering the original story from the comics. That being said, it will be interesting to see what Marvel Studios plan to do with the arrival of the Multiverse. Could this be the opportunity to create new Earths? Answer soon thanks to Phase 4 of the MCU!