Image: Marvel/Ryan Meinerding

We can pretty much assume that Avengers: Infinity War and the fourth Avengers film will kill off one or more superheroes. Obviously Joe Russo, who co-directs both with his brother Anthony, wouldn’t name names on the San Diego Comic-Con red carpet—but he sure did take an ominous tone when we asked him what to expect.

Avengers: Infinity War is due out May 4, 2018.