Trivia / What If…? S1E1 "What If… Captain Carter Were the First Avenger?"

• Billing Displacement: While the various Celebrity Voice Actors are billed in the opening credits, Josh Keaton is not, despite having the second largest role.
• Follow the Leader: It's no coincidence if Peggy's combat moves have much in common with the incarnation of Gal Gadot's Diana of Themyscira/Wonder Woman from the DC Extended Universe, even including a sword.
• The Other Darrin:
  • Josh Keaton voices Steve instead of Chris Evans.
  • Also, Ross Marquand plays Red Skull in place of Hugo Weaving, reprising his role from Avengers: Infinity War and Avengers: Endgame.
• Role Reprise:
  • Dominic Cooper returned to voice Howard Stark five years after the cancellation of Agent Carter.
  • So did Neal McDonough as Timothy "Dum Dum" Dugan, six years after the character was last seen in the first season of Agent Carter.
  • Stanley Tucci voices Abraham Erskine ten years after Captain America: The First Avenger.
  • Toby Jones as Arnim Zola six years after he was last seen at the end of the first season of Agent Carter.
  • Bradley Whitford as Colonel Flynn eight years after the Agent Carter short.
• What Could Have Been:
  • Bryan Andrews wanted to have The Rocketeer appear with this episode alongside Captain Carter and a post-serum Steve Rogers, but Kevin Feige disapproved of it due to copyright issues and because it would raise the question of if Howard Hughes would exist in the MCU. Steve becoming the HYDRA Stomper is presumably left over from this idea.
  • One spinoff idea for this episode would've had Steve falling off the HYDRA train instead of Bucky, and end up becoming the MCU's equivalent of Captain Hydra, a high-ranking commander for HYDRA. This would've forced Peggy, Howard, Bucky and Red Skull to work together to defeat Steve. The idea was scrapped due to the story being too similar to this episode's concept, though it did get A.C. Bradley hired as the showrunner.

---