There are still two films left before Avengers: Doomsday, but Marvel Studios has already accelerated the marketing machine.  Fans anticipate that Thunderbolts*, which will debut on May 2nd, will undertake a significant amount of the labor in establishing the conflict of the upcoming major Avengers film.  As always, Marvel is trying its hardest to keep things under wraps. Thunderbolts* looks to be a thriller about a squad of anti-heroes who "all just punch and shoot," lacking the Avengers' ostentatious, galactic-level abilities.  Fans have, however, developed some fascinating hypotheses about how Thunderbolts* can surprise us and set the stage for Doomsday.

The Avengers are off-world
We may infer from the Thunderbolts* trailers that there aren't any Avengers on Earth when the film is set.  That made sense in the beginning because there didn't appear to be an official Avengers squad roster, and perhaps no one was using the term at all because so many Infinity Saga characters were no longer around.  However, sam Wilson's decision to resurrect the Avengers and develop the confidence to take on a leadership role played a significant influence in Captain America: Brave New World.

Fans are already speculating that by the time Thunderbolts* begins, Sam's new Avengers will be assembled.  Off-screen team-building makes sense, and the anti-heroes will probably roll their eyes when they see it on the news.  It's not really worth doing on screen because fans are already quite certain of who sam will ask to join his new team.  Alternatively, we can ignore this news here and return to it when it becomes pertinent in Doomsday.
 

However, the Avengers would need to be distracted and out of reach if the Thunderbolts were to face a serious threat without their help. This is where the idea comes in; in the teaser, Valentina reminds congress that Sam's new team is off-world and cannot assist with whatever peril they are facing by saying, "The Avengers aren't coming."  Doomsday might be set up by this explanation of the new Avengers' first high-stakes assignment; they might be looking into an invasion from a different universe or have been imprisoned in another reality.

When you consider Bucky's position in Thunderbolts*, this truly works.  Bucky had put up his superhero ways and was campaigning for congress when we last saw him in Brave New World.  But in the trailer for Thunderbolts*, we see him following the other Thunderbolts in the manner of a Winter Soldier.  Perhaps Bucky regrets not agreeing to accompany Sam's Avengers on their risky mission.  If the Thunderbolts are his best hope to save the globe and/or save sam, he would be even more driven to get them in shape.
 

Trading Powers
A 2006 comic book and the MCU's Secret Invasion are combined in another entertaining hypothesis to explain how Yelena Belova could grow strong enough to join the Avengers.  With the help of a medication that contained dna from some of the most potent characters in the MCU, we were given "Super Skrulls" in Secret Invasion, who were able to wield all of their abilities simultaneously.  The Super-Adaptoid, a long-running Marvel Comics character that could steal superpowers from others to further their own agenda, is not all that dissimilar from this.
 

Hydra scientists gave Yelena the Super-Adaptoid's abilities in 2006's New Avengers Annual #1, intending to use her to destroy the Avengers.  Her greatest moment of power in that story was when she appropriated Sentry's abilities, who, coincidentally, makes her MCU debut in Thunderbolts*.  Yelena is probably going to get a power-up here, which will make her statement that she can only "punch and shoot" a little more ironic.

This power-up could affect Avengers: Doomsday in several ways.  It might just demonstrate that Yelena and her companions are formidable, causing the Avengers to take them seriously.  Additionally, it might attract the interest of other people, possibly even adversaries from different realities.  This could be the catalyst for the entire crossover since the power shift could potentially be sufficient to trigger some sort of intrusion.

Surprise Doomsday
At last, Robert Downey Jr. is certainly eager to return to the MCU, this time wearing a steel mask and green cloak.  Given how much Marvel has been hinting at this antagonist, it is quite probable that he will make an appearance in Thunderbolts*, permanently connecting the two films.  Although many fans anticipate seeing him in the post-credit scene, we can even conjecture that he will rip a wormhole in the main plot.
 

Even while this theory seems solid, at this stage, our only option is to conjecture.  Sentry's future appears bright; despite some fans' expectations that he will be the "big bad" of Thunderbolts*, Marvel has revealed that he will be making an appearance in Doomsday.  This indicates that he not only makes it through the movie, but also stays relevant enough to reappear.  When Doom emerges as the true villain, perhaps Sentry will join the Thunderbolts in their battle against him.
 

 
 
 


 
 

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