As soon as WandaVision's Monica Rambeau mentioned that she has a friend who's an aerospace engineer, speculation started running rampant about who that might be. We know this mystery character has created the vehicle the S.W.O.R.D. agent will use to travel into Westview, but who's to say it's a character from the comic books?
This person could, after all, simply be an unnamed ally of Monica's. However, with so many mysteries in WandaVision, fans immediately began to speculate that it could be anyone from Reed Richards to Blue Marvel!
Now, with less than 24 hours to go before a new episode hits Disney+, actress Teyonah Parris has teased a big reveal in regards to the aerospace engineer's identity.
"When I, well ... I can't wait to see what y'all's reaction is when you learn who the aerospace engineer is," she told ComicBook.com. "Everything about this show excites me. There are so many little surprises, things you don't expect. So in keeping with the theme the show has already set up, I'm always excited."
So, it definitely seems to be someone big, and it would be pretty mind-blowing for a pre-Fantastic Four Reed Richards (played by John Krasinski, of course) to show up outside of Westview.
It's best not to get too excited, but it sounds like another reveal is coming our way in tomorrow's episode of WandaVision that Marvel Studios has managed to keep a secret. It's possible this is just a cool guest actor, so don't bank on it setting something huge up for the MCU.
What are your theories for Monica's mysterious aerospace engineer friend?
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our predictions for WandaVision's big guest star!
5. The Original Quicksilver
At the end of last week's episode of WandaVision, we learned that Wanda (or someone...) had "recast" Pietro. Playing Wanda's long-lost brother was Evan Peters, the actor best known for starring as Quicksilver in Fox's X-Men movies. Look online, and you'll find plenty of theories about him.
Some believe it's Pietro's "spirit" in a new body, while others have argued this is just a random Westview resident forced to play Wanda's brother. The most compelling theory, however, is that he's secretly Mephisto, and is only there to manipulate the Scarlet Witch and stop her leaving this reality.
Regardless, we honestly wouldn't be surprised if Aaron Taylor-Johnson makes his surprise return as the real Quicksilver. If Wanda fully embraces her reality altering powers in the finale, then she could bring the real deal back from the dead, proving that there are no limits to her powers (and, despite what she told Billy and Tommy, the Scarlet Witch is powerful enough to break the rules).
4. Mojo
Even assuming Mephisto isn't responsible for what's happening in Westview, it's still safe to assume that "Agnes" will be revealed as Nightmare (likely combined with Agatha Harkness).
The ruler of the Dream Dimension clearly wants to get her hands on the twins for some sort of sinister reason, but what's the deal with the sitcoms? Well, that could be explained with the introduction of Mojo. His race was driven insane by television signals from Earth, and he loves creating his own entertainment...so, what if Nightmare was forced to turn to him for help here?
She might not be powerful enough to trap Wanda in a setting where she can be easily manipulated, hence why Mojo was necessary to create a sitcom world, and provide the necessary technology. This would be a weird direction to take things down, but Marvel Studios might be able to pull it off!
If nothing else, he might be shown tuning in...
3. Spider-Man (Not That Spider-Man)
Despite what Tom Holland says, the signs do appear to be pointing to Tobey Maguire and Andrew Garfield being part of Spider-Man 3. Plus, with Sam Raimi at the helm of Doctor Strange in the Multiverse of Madness, the prevailing theory is that the Sorcerer Supreme will team up with Maguire's Spidey.
Don't forget, Sony Pictures has agreed to allow Marvel Studios to use Spider-Man in at least one more MCU movie, but who said it had to be the version played by Holland?
So, if the Scarlet Witch is responsible for tearing a hole in the Multiverse, it's feasible we'll get our first look at Maguire's world, and Strange will need to enlist his Spider-Man's help to get this one back to his world. Perhaps this will take too much time, but if nothing else, a glimpse to tease Spider-Man 3 would work!
2. The Beyonder
If it's not Mephisto pulling the strings, then there's another possibility (and one who could be used to lay the groundwork for Phase 4/Phase 5's new big bad). Just like Thanos was introduced in The Avengers' post-credits scene, The Beyonder could appear in WandaVision's stinger.
Revealing he was responsible for twisting reality and creating those sitcoms, the stage would be set for an even bigger clash down the line...Secret Wars! Avengers: Endgame directors Joe and Anthony Russo are keen to make that a reality (no pun intended), and a being as powerful as The Beyonder could explain both the Multiverse madness and the introduction of the X-Men.
A slow-burn approach to this debut would be sensible, but some sort of tease in the WandaVision finale - with an A-Lister playing the villain - would be nothing short of mind-blowing for comic book fans.
1. Magneto
How cool would this be?
There was a fake leak about Magneto appearing in WandaVision, but the iconic comic book character arriving to claim his daughter (similar to the end of Avengers Disassembled) would be one heckuva twist, teasing a secret origin story for Wanda Maximoff and the arrival of mutants.
If they've been hiding out in the shadows all this time, then it makes perfect sense for Magneto to make his presence felt, taking his mutant daughter back to Krakoa or wherever the mutants call home.
We'd lose our minds if Michael Fassbender plays Erik, and that could tie nicely into whatever is going on with the Multiverse (similar to Evan Peters returning as Quicksilver). Time will tell, but it would be a big mistake not to explore Wanda's history as a mutant and with her father, Magneto.