Marvel geeks were caught off guard yesterday when the long-awaited event, anticipated since April 2019, arrived with a dramatic twist: the MCU brought back Robert Downey Jr., the late Iron Man, with a new mask for a familiar mission. In the aftermath, fans could not help but speculate about the future, recalling Downey Jr.'s collaboration with Cillian Murphy last year, sparking a wave of new fan theories. While fans are well aware of their atomic partnership that landed on the Oscar credits this year, the possibility of a superheroic showdown now has fans on their toes.

YouTuber Blurayangel recently took to X to spark a discussion of exciting theories, sharing speculation from a friend who believes that Robert Downey Jr.'s confirmed role as Doctor Doom in Avengers: Doomsday might actually be a smokescreen to reveal Cillian Murphy in the film. While some fans dismissed it as merely "wishful thinking," others shared similar sentiments and outlined potential plot directions this theory could take.

Since the announcement of Robert Downey Jr. taking on the role of Doctor Doom, speculation has been rampant about who could rival this iconic villain from the Fantastic Four universe in the upcoming Avengers: Secret Wars. With fans’ eyes on Cillian Murphy to join Downey Jr. in a superhero suit, they are increasingly convinced that this might be the MCU’s major plan for the next saga following the Multiverse storyline. 

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Consequently, fans are exploring various theories, each more thrilling than the last to place the atomic duo once again on the foray of anticipated blockbusters. 

Following the biggest unveiling of the Marvel Cinematic Universe with the unmasking of Robert Downey Jr. as Doctor Doom, fans are majorly of the opinion that he will be a variant of the classic Marvel villain. One fan speculated that Downey Jr. might play this variant throughout the Multiverse Saga, culminating with Avengers: Secret Wars, after which the original Doctor Doom, Victor Von Doom, would be introduced.

Another fan, while excited, was cautious about getting their hopes too high. There were plenty of others who believed the theories were rather far-fetched.

Meanwhile, one fan pointed out that Downey Jr. was cast as Doctor Doom rather than Victor Von Doom, leaving room for the latter's introduction later. Although it is uncertain if Cillian Murphy would be the ideal choice for the role, the enthusiasm among fans suggests that the studio might indeed consider it, potentially setting the stage for a blockbuster event.

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What do you think of fan theories placing Cillian Murphy alongside Robert Downey Jr. following his cast confirmation as Doctor Doom in the MCU? Let us know in the comments below!