Concerns Over Ultron's MCU Return
The Marvel Cinematic Universe is known for its interconnectivity, with major characters making unexpected appearances in various movies.
This has been evident since Robert Downey Jr.'s unannounced appearance in The Incredible Hulk, and has continued with recurring appearances by Samuel L. Jackson and Tom Hiddleston's Loki.
Villains have also made surprise returns, such as Samuel Sterns in Captain America: Brave New World, 17 years after his last appearance.
The studio has made it clear that no character is truly gone for good.
Author's summary: Marvel's interconnectivity may ruin Ultron's return.