Sam Raimi confirms that John Krasinski’s Doctor Strange cameo was nothing but fan service
Don't count on that version of that character ever appearing again
About halfway through Sam Raimi’s Doctor Strange In The Multiverse Of Madness, the eponymous wizard finds himself lost in the eponymous multiverse, with him and new buddy America Chavez finding themselves in an alternate reality where their Doctor Strange is dead and their preeminent superhero team is not the Avengers but the Illuminati—consisting of a bunch of fan-favorite cameos from beloved superheroes and actors, as well as Black Bolt of the Inhumans. One of those cameos in particular, John Krasinski as Reed Richards of the Fantastic Four, was a payoff to years of fan-casting, based largely on the fact that Krasinski looks a fair amount like the character and that it would be fun to imagine him as Mr. Fantastic and Emily Blunt as Sue Storm.