What If Boo Grew Up? (Monsters Inc. 2)

While the "Monsters, Inc." franchise has marched forward with a prequel film and series, it's never addressed how the relationship between Sully and Boo continued on after the first film. It's unlikely that we'll get an answer any time soon as director Pete Docter has said he wants to leave it up to the audience to wonder where the characters' friendship went in the future. Well, here's FanScription's interpretation! Doug Walker asks and answers the question; What if Boo grew up in a "Monsters, Inc." sequel?