Okay, but hear me out: 1970s! AU with the PPGs in huge shoe-obscuring bell-bottoms and funky hair-dos. BONUS: Jack and Blossom making out, and Jack covered in Bloss' kissmarks, ala Archie Comics. Your art is awesome, BTW.
Jacksom, stardust, steampunk au where jack is a scientist for heylin industries that manly focuses on studying these artifacts called Shen Gan Wu and discovering what they do before xiaolin corp. Jack believes there power comes from cosmic energy but no one takes him seriously. One night he see’s a star fall past the wall. A boarder no one is allowed to pass, Jack then sets out to find the star and prove his theory right. He then uses a black candle to teleport to the stars location.Landing right on top of the star named blossom. Jack is at first love struck, while blossom is frustated. The two strike up a deal, blossom will go with Jack to prove his theory, and he will figure out how to get her home. So they journey though the land of reaping. Trying to find there way home, encountering many new friends, and enemies, including princess, princess of the witches/warlocks and her red knight Brick.