Guardians 3: 10 Actors Who Could Play Adam Warlock
4. Kit Harrington
So, Game of Thrones' final season may not have ended to everyone's tastes, but that doesn't discount how stellar the cast were over its long run.
This is true for Kit Harrington, his performance as the show's default heroic warrior making what would usually be a rather boring character actually rather endearing.
With Adam Warlock basically being Marvel's default heroic warrior (outside of Captain America or Cyclops), Harrington would be a fantastic choice for the role, from both a visual and acting standpoint.
Space would be a vastly different setting for the actor, defining this potential role from his previous ones, even if he would be playing a very similar archetype to his previous work - creating a juxtaposition that would make his casting particularly interesting.