Nah to me the best post finale scenario would be Marco with Jackie, all the monsters with that horrible smell got the french girl to run away, because if she wanted bad smell she would have stayed at her country.
Marco, while Star was arrested and awaited flr trial, had the chance to talk with his friends, who were there to support him. Explaining that magic was deleted from universe thanks to Star brings up the subject of the little head on his neck, he explains that was a curse, which is similar, then also mentions the curse of the blood moon and Jackie understands, she looks down after the ebony french returned to France.
After some moments together Marco's original feelings towards her re-flourish, free from the leftovers the curse had on him.
Marco really wishes to try, asks forgiveness from his mistakes, shows Jackie some really cool moved he learnt in his years in the neverzone.
Pic not related but a good example as well.