Future of Story

This is a story starting in Warhammer 40k universe with a few tweaks, to clarify the story is not about the Emperor of Mankind but someone else. The person who walked away is not the Emperor because Emperor is born. The MC is either a reincarnator(same universe) or transmigrator (from different universe) I am still deciding.

There will be intermissions centreing around Emperor's journey through history as well other povs depending on world. My grammar is shit but I will try to make it readable. Probably not gonna do any sex scenes, but for sure gonna be a lot of gore (maybe)

Future worlds will include Halo, Star Wars for sure.

I need suggestions for 2 magical worlds like harry potter...etc and 2 more worlds of whatever (games/books/movies/shows/not anime/create own world).

1. WarHammer 40k (sci-fi)

2. Halo (sci-fi)

3. Star Wars (sci-fi)

4. Harry Potter (magic)

5. ? (magic)

6. ? (magic)

7. Avatar the last airbender

8. ?

9.?