>>78323993I'm neither a writefag nor do I greentext but I think the story would go like this:
Star and Marco are living happy together, eating nachos and going to adventures, then suddenly many terrorist attacks start on earth and in Mewni, both sides blame the other as there is evidence for that. Earth couldn't be it though as they can't go to Mewni but it could be, that they got magical scissors from someone. The conflict gets worse and worse and Star as someone who loves earth is forced to escape together with the Dias family as she doesn't want to be separated from Marco and neither does she want to be captured by the humans. As they escape, Star and Marco get sepparated from Marcos parents.
At some point they meet Ferguson who tells them, he saw that their parents have been captured by the military. Meanwhile King butterfly plans to bring Star back but he can't send a whole army to the other side to find her, so he sends a magical ghost who has to convince Star to come back on her own. The ghost finds her and tells her, that her parents are worried and they want to talk things out but first she has to come back, Star decides to go save Marcos parents first, the ghost says he'll help her.
As they are intruding the military base where Marcos parents are supposed to be. Star and Marco get sepparated, Star finds out what the military do to Mewni soldiers and then she gets captured. Marco gets captured as well and he meets a general who tells him, they don't have his parents but the Mewni have them and Marco should help to convince Star to cooperate in order to bring this war to an end, Furgeson was also there and he tells Marco he lied because he thought this would be for the best.