I won't be surprised if Doom alters his appearance to be Prof. X, Cap, or anyone else to suit his needs. Stark is a powerful choice to influence Thor, as would be Odin, Loki, or Heimdall.

Also won't mind some of in-fighting exposition as long as it serves the story. Gambit vs Shang-Chi looks interesting...hopefully it's not just one of them popping up in a strange place that leads to it.