Doctor Doom has his archnemesis in chains

Adding onto the medieval time travel theory is an image of Doctor Doom himself sitting on a throne surrounded by mostly faceless subjects also in period clothing, but he also has what looks to be Reed “Mr. Fantastic” Richards on his knees, chained up and awaiting judgment. Doom is notably not the main villain in the upcoming Fantastic Four: First Steps, so it’s unclear if we’ll get much of a sense of the relationship between these two before Avengers: Doomsday premieres in 2026. It’s also unclear if this art is depicting the beginning of a new conflict between them or if it’s building off of something we’ll see unfold in First Steps. (Doom is confirmed to appear in the film in a post-credits scene.)
Another wrinkle in all of this is that it appears Doctor Strange and possibly Yelena are working for Doctor Strange in this odd reality. It looks like Doom’s presence may do a lot more than just yank us backwards in time.