Plot idea 1: the reconstruction of valla but it's Azura who became queen and she finds clues that say that Anakos didn't die or something like that.

Plot idea 2: How Sumeragi meet Ikona and her downfall.

Plot idea 3: Nohr during the concubine wars.

Plot idea 4: Hoshido after Sumeragi's death.

Plot idea 5: A Pokémon murder mystery.

Plot idea 6: Au where Camilla becomes queen after Birthright.

Plot idea 7: How Hinoka handles being queen after Conquest.

Plot idea 8: Breath of the Wild before the calamity and all the champions are alive.

Comment which ever one you want to write. I can make a cover for most of these ideas if you would like me to.