Days after Avengers: Doomsday's directors issued a cryptic tease regarding the movie's recent teasers, one fan believes they've "cracked the code" hidden in their countdown clocks.

No one seems to have found anything conclusive, but the main theory is that the Doomsday clocks shown in each trailer correspond to an hour and a minute in Avengers: Endgame, the Russos’ last feature, and that Doomsday is said to be a “direct sequel” to it.

Once Marvel Studios completed Avengers: Doomsday 's four trailer rollout, the Russo brothers delivered a surprising tease. In an Instagram post sharing the Black Panther and Fantastic Four Doomsday teaser, they said that the four pieces of marketing aren't trailers but stories and clues about what's coming.

Doomsday theory posits that each of the countdown clocks in the movie's teaser trailers is referencing specific, Multiverse-related scenes in Avengers: Endgame.

Those four trailers — initially attached to Avatar: Fire and Ash — have given fans a first look at the movie's big players in action, though revealed relatively little about the overall plot. And, notably, Doctor Doom himself, played by Robert Downey Jr., has remained under wraps.