
The White Lotus actor Carrie Coon, who appeared in Avengers: Infinity War as villain Proxima Midnight, allegedly didn't return in a speaking and motion-capture role in Avengers: Endgame after a pay dispute – and received a blunt reply from Marvel in response.
According to playwright and actor Tracy Letts (Coon's husband and owner of the best shared Letterboxd account), Coon was asked to return in Endgame but talks ultimately broke down.