I don't know how you plan to outline the story, whether more comical or more dramatic in nature. But instead of just making them homesick, which would no doubt be all-too convenient. You could make them struggle through it, and perhaps even have them face their inner demons as the go deeper and deeper into their lies. Maybe even have Pinkamena? That would certainly be interesting, but what Ashton was saying works well too! Keep up the good work.