I hope it does not take spring 2024 (slotted for Daredevil's new series) for Castle gets his shot (pun intended). Reviewing known Phase 5 movies and shows, I *think* it is safe to eliminate the following as a Castle cameo, who is primarily an Earth, non-time hopping, magic adverse based character:
Guardians of the Galaxy Vol. 3 -- May. 5, 2023
The Marvels -- Jul. 28, 2023
Loki Season 2 -- Summer 2023
Agatha: Coven of Chaos -- Winter 2023
That leaves:
Ant-Man and the Wasp: Quantumania -- Feb. 17, 2023
Secret Invasion -- Spring 2023
Echo -- Summer 2023
Blade -- Nov. 3, 2023
Ironheart -- Fall 2023
Captain America: New World Order -- May 3, 2024
I believe it is a safe bet
AATW is a scratch. No need to punish microscopic villains.
IH is the next legacy of an Iron Man type story. Do not see Castle running in her circle or her needing his protection.
SI? That fits pretty well with his skill set, whether it is dealing with human or Skrull.
Echo will likely delve on the dark side of criminal activity. I would say ditto but I also expect Murdoch to be the other main protagonist in her series.
That leaves The Daywalker and
CA:NWO. Both fit extremely well in The Punisher's wheelhouse, even with the supernatural element attached to
Blade. And I can easily see Frank wanting to establish his version of a 'new world order', even if it is only a piece of his.
100% agree as long as Wilson Bethel reprises the role or another similar actor to him. I was not a big fan of Colin Farrell as Bullseye and hope there is less than zero chance of him wiggling into the MCU via his old role.
Sweet Christmas!