Concerns Over Ultron's MCU Return
The Marvel Cinematic Universe (MCU) is known for its interconnectivity, with major characters making unexpected appearances in various movies.
This was evident when Robert Downey Jr. appeared in The Incredible Hulk, and also with the recurring appearances of Samuel L. Jackson.
Villains have also made surprising returns, such as Samuel Sterns in Captain America: Brave New World 17 years after his last appearance, and Tom Hiddleston's Loki, who has popped up multiple times throughout the franchise.
The Marvel Cinematic Universe has always been built around its interconnectivity.
Author's summary: The return of Ultron may ruin the Avengers villain.