For newcomers of the game please stay away as this might have spoilers
I feel the need to say this would be a personal project somewhere in the future and not really something done as dev thing. If I were to try to make wallpapers with pokemon in them mostly reborn themed like say events in the game that have to do with pokemon for instance a alley zorua or absol having some certain premonition scene (but without any characters in the scene) in the game that you find notable. not super story focused things like the hydragon scene you know the one, just little mundane or sidequest, things having pokemon in them. Hope I made a clear Idea of what to suggest. This would might be after reborn and just a little side thing I'd like to try.
The wallpapers with pokemon in them fascinate me because they are animals with personality so thought this'd be a fun what if there reborn focused ones