After the God of Mischief sacrificed himself at the end of ‘Loki’ Season 2, fans have been wondering about how Marvel Studios will bring the beloved character back into the main MCU timeline.
One emerging theory is that ‘Avengers: Doomsday’ won’t bring Loki back to the franchise for a glorious comeback, but rather to make Doctor Doom the biggest threat in the franchise.
Marvel May Use Loki’s Sacrifice To Make Doctor Doom An Instant MCU Threat

Though Marvel has not officially confirmed any details of the plot, the theory offers an intriguing way to tie the end of the Multiverse Saga’s Kang arc into the rise of Doom. ‘Loki’ Season 2 ended with a change for the better.
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Instead of taking up a seat on his own throne, Loki took on the role of keeping all the divergent timelines together and, in essence, became the living ground for the multiverse. That sacrifice put him on a higher pedestal than that of a regular superhero or antihero.
With this, Loki was the only one standing in the way of reality collapsing, and he was arguably the most important character in the MCU’s multiversal story. If Doctor Doom’s first big move is to kill Loki, the repercussions would reach far beyond one character’s demise.
If Loki did not keep the timelines, incursions might get out of hand, universes might start colliding, and chaos could reign throughout the multiverse. Marvel could make Doom an immediate threat to reality, rather than just a formidable foe.
Doctor Doom’s Arrival Would Change Everything

This theory has been gaining traction because it provides a logical progression after Kang’s diminished involvement in the Multiverse Saga. Rather than ignoring the events of Loki, Marvel could use them as the launching point for Doom’s reign.
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In this scenario, Doom wouldn’t need a dramatic speech or an elaborate introduction. His actions would speak for themselves. Quietly removing the one person holding reality together would immediately demonstrate why every hero, from the Avengers to the Fantastic Four and the X-Men, must unite against him.
To add to the mystery, Tom Hiddleston has already teased Loki as having an important promise to keep in ‘Avengers: Doomsday’. He didn’t give any details of the story, but his remarks have only fueled speculation that Loki’s return will be a major part of the future of the MCU.
If ‘Avengers: Doomsday’ takes this route, Loki’s comeback might not be to secure yet another triumph for the God of Mischief. Instead, it might be the emotional catalyst that introduces Doctor Doom’s era and paves the way for the MCU’s biggest clash of all time.
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