When Marvel Studios revealed Eternals in Hall H at San Diego Comic Con last month, they brought members of the large cast on stage. But despite what a lot of people on the internet assume, that was not the entire cast. There are still several large roles to cast in the movie (including the main villain), and another one may have been filled.
According to Variety, Gemma Chan is in talks to join the ever-growing cast, and they say she likely won’t be playing Minn-Erva;
Some sources have indicated that her part in “The Eternals” would be a completely different role, which if true, would mark one of the first times a star will have played two different characters in the same cinematic universe.
As for the roles remaining to be cast, according to the past leaks of casting grids, there’s still “Karen” and Sersi, so she could end up being either of those characters.