Cameo speculation thread since we're less than 2 weeks away from this movie and there's still a ton of conflicting info. Potential spoilers ahead obviously.

Confirmed cameos:
>Patrick Stewart's Professor X
>Hayley Atwell's Captain Carter
>Lashana Lynch's Maria Rambeau
>Chiewtel Ejiofor's Mordo

Speculated, but backed by several credible leakers:
>John Krasinski's Mr. Fantastic
>Anson Mount's Black Bolt
>Bruce Campbell's Balder the Brave

Speculated, but only backed by one or two leakers:
>Tom Cruise's Superior Iron Man
>Magneto (Unknown Actor)
>Ryan Reynold's Deadpool (Post-credit scene)

Wild cards / Pure speculation:
>Paul Bettany's White Vision
>Tom Hiddleston's Loki
>Tobey Maguire's Spider-Man
>Nicolas Cage's Ghost Rider
>Sophie Turner's Jean Grey
>Hugh Jackman's Wolverine
>Halle Berry's Storm
>2005 Fantastic Four

Is there any that I missed?