What if this happened: Andi Mack is revived, and Andi is now older and works with kids, and she reunites with Jonah Beck, and eventually they start dating again and it all leads up to the Alter.
Also, did you envision Andi being an art teacher or something else? Maybe Jonah is the music teacher at the school and that's how they reconnect? Oh, and what's the Alter?