First, this is just Theory and don't angry if you disagree.

Second, well let see your Theory too.

1. WandaVision is a totally set for Phase 4, (confirmed).

2. There Will be an Mutant first appearance in Falcon and The Winter Soldier.

3. Black Widow is in Phase 3 (Confirmed), and take place after Civil War (Confirmed).

4. Loki Will introduced Mephisto and another hell/satan being in MCU (also Blackheart son of Mephisto).

5. Big bad Villain from Earth (Avengers level threath) is Druig from Eternals.

6. Big bad Villain for street level hero is Kingpin.

7. Big bad Villain for Cosmic and Magic level threath is Mephisto.

8. There is no Galactus in Phase 4.

9. If Spiderman still on Disney and Marvel Studios, i think there Will be more Spidey film after Spiderman No Way Home, first is Spiderman Ecounter with Deadpool and Deadpool will be a Spiderman Father Figure, and Second is for Spiderman College time and the friendship with Iceman and Pyro.

10. Punisher will have an important role for Phase 4.

11. Defenders Will have a film, directed by Matt Reeves/Zack Snyder.

12. Daredevil on Spiderman: No Way Home.

13. Ms.Marvel will introduced Inhuman Family, in greater MCU.

14. Moonknight and Hawkeye will introduced Count Dracula, another bridge for Blade.

15. Blade is R Rated movie.

16. Thor: Love and Thunder will introduced another space threath beside Gorr The Godbutcher (in my opinion, it Will be some Galactus Easter Egg).

17. Shang Chi is takeplace in the five years gap after Infinity War and Endgame.

18. Mandarin will be another simpathetic villain.

19. Iron Fist on Shang Chi and The Legends of The Ten Rings.

20. Jessica Jones and Luke Cage on She Hulk.

21. Punisher on Armor war and Moonknight (for Moonknight, i think Punisher Will show up on flashback scene, because Moonknight is an army like Punisher too).

22. Agents Of SHIELD Canon with WandaVision and Upcoming Secret Invasion Series.

23. Big Hero 6 will another young Hero after Spiderman, Cloak and Dagger, also Runaways.

24. Tadashi on Big Hero 6, is a friends of Tony Stark on Japan.

25. Fantastic Four will be Canon with She Hulk and Ironheart.

26. Deviant will attack Earth.

27. Black Knight from Eternals will join MI13 and Excalibur.

28. Captain Britain will introduced more on Phase 4, and let's hope that Henry Cavill will take that role.

29. Do you have another Theory??