1. Mike is gregory's adopted father, when Abby grew up.. He missed raising a kid, so he adopted gregory, and after Gregory went missing Mike panicked and looked for him constantly
2. When Abby grew up the became an employee for the pizzaplex due to her feeling attached to all types of Freddy's pizzeria
3. I made a new theory (Galmmax) maxine posses Glamrock Freddy after the fnaf 6 fire due to her guilt of betraying Abby and Mike and swore to protect any child after that + The reason she calls Gregory "superstar" is because she calls kids shes attached to (so abby, The MC, and gregory) superstar