Summary
Deadpool & Wolverinecould have included a villain that has long been requested for theMarvel Cinematic Universe. As the biggest exploration of the multiverse to this day,Deadpool & Wolverine’s castis set to include several surprises. However, there is a major Marvel villain who will not be part of those, as the character was passed over in favor of makingCassandra Nova the main villain ofDeadpool & Wolverine.
Speaking toCollider,Ryan Reynolds andDeadpool & Wolverinedirector Shawn Levy commented on how they considered using Mephisto as the villain of the MCU movie. The creatives commented on how Mephisto, who was heavily rumored to appear inWandaVisionbut never showed up, was the villain they flirted with forDeadpool & Wolverine’s storybefore cracking it down. Ultimately, Cassandra Nova’s connection to Charles Xavier — and Wolverine through him — led to her being chosen. Check out the exchange below:

LEVY: What was the name of the villain we flirted with?
REYNOLDS: Mephisto.
LEVY: That’s who it was. We went through a lot of “almost” versions of this story before we landed. Frankly, it was the infamous call from Hugh, but then it was this idea of Cassandra Nova as a sibling to Charles because Cassandra’s link to Professor X creates an interesting dynamic and fascination in Cassandra about you [to Jackman].
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How Mephisto Could Have Appeared In Deadpool & Wolverine
A Resurrection Could Have Been In The Cards
Mephisto is a demon lord from Marvel Comics who rules a pocket dimension often referred to as Hell. The character could have been used inDeadpool & Wolverineto bring back a deceased player from the Fox X-Men movies or other projects. A possible name is Hugh Jackman’s Wolverine, who died inLogan. Deadpool could have gone to Mephisto upon learning of Logan’s death and made a deal to resurrect him.
Like what happened with Spider-Man in Marvel Comics' One More Day,Deadpool & Wolverinecould have had Mephisto steal Wade Wilson’s happiness. In that story, Peter Parker gives up his relationship with Mary Jane Watson so that Aunt May does not die. AsDeadpool & Wolverine’s trailers have revealed that Reynolds' Wade and Morena Baccarin’s Vanessa are no longer together, maybe that was always the plan, with Mephisto taking their relationship and resurrecting Wolverine or someone else originally.

Another possible use of Mephisto could have been to give Deadpool a new romantic interest. In the comics, Deadpool and Lady Death have a long history.Deadpool & Wolverinecould have followed Wade Wilson going to Hell and back several times as he died on multiverse missions in the real world, each time getting to see Death and Mephisto, who would take Thanos' place in the dynamic the trio had in the comics, wanting Death for himself. With Mephisto rumored to be inIronheart, maybe he will debut shortly afterDeadpool & Wolverine.
Deadpool & Wolverine
Cast
A follow-up to the highly successful Deadpool and Deadpool 2 films starring Ryan Reynolds as the Merc with a Mouth. The third film will be the first in the franchise to be developed under the Marvel Studios banner following Disney’s acquisition of 20th Century Fox.