At Last, [SPOILER] Makes Their Official MCU Debut in 'Multiverse of Madness'

Spoiler alert: This article contains major spoilers for Doctor Strange in the Multiverse of Madness.

With the multiverse being torn asunder, Doctor Strange in the Multiverse of Madness throws the MCU into chaos. But with old Spider-Men from alternate realities arriving at the scene, what does that mean for characters like Mr. Fantastic?

Since the barriers between alternate dimensions are breaking, Doctor Strange must figure out how to preserve the multiverse before reality crumbles. He seeks the help of Wanda Maximoff, who quickly takes matters into her own hands.

Now, there are few lines anymore between studios. Sony characters appear alongside Disney properties and Marvel Studios squarely owns the rights to characters like the Fantastic Four. So, does Mr. Fantastic show up in the film?

Let's get one thing straight: Doctor Strange in the Multiverse of Madness delivers some of the most mind-blowing surprises and cameos. Although many rumors circulated on social media for the past year, nothing could be confirmed ... until now.

After landing on Earth-838, Doctor Strange encounters an alternate version of Baron Mordo (Chiwetel Ejiofor), who claims the sorcerer is a threat to humanity. Once taken into custody, he meets a team of heroes that has the audience weak in the knees.

"The Illuminati will see you now," Baron mutters before the group makes their presence known. The members of the secret society include Captain Carter (Hayley Atwell), Maria Rambeau/Captain Marvel (Lashana Lynch), Black Bolt (Anson Mount), Professor X (Patrick Stewart), and Reed Richards/Mr. Fantastic (John Krasinski).

So, to answer the biggest question of all, yes, Mr. Fantastic is in Doctor Strange in the Multiverse of Madness.

Now, the cherry on top is that The Office and A Quiet Place star John Krasinski steps into the role. For years, Marvel fans have fan-casted the 42-year-old as "the smartest man alive," so seeing it come to life on the big screen is a literal dream come true.

Unfortunately, Mr. Fantastic's on-screen presence is cut short once a vengeful Wanda, who's controlling her Earth-838 self via the Darkhold dream-walk, arrives and slaughters the Illuminati with ease.

After Black Bolt dies, Mr. Fantastic stretches his arm out to prevent Wanda from causing further damage. However, Wanda counterattacks, overstretching and shredding Mr. Fantastic's body until he explodes. It's truly a brutal and disturbing scene.

OK, so given the circumstances and the nature of the multiverse, it's likely that John will not return to play Mr. Fantastic. For us, his brief appearance feels like fan service rather than permanently cementing him as the MCU's Fantastic Four leader.

Still, we can never be too sure. For all we know, John could agree to return as the Earth-616 version of the character, but that depends on if he's willing to stick around for several more movies and if Marvel Studios is pleased with his portrayal.

Doctor Strange in the Multiverse of Madness is now in theaters.