Someone on a Pixar forum pointed this out: Randall and Mike may have been ROOMMATES. Watch the “Pig” clip closely. Note the Winds of Change poster, the purple bedding; and the purple, googly-eyed slippers on the floor. Also note that (in the original trailer) Mike’s roommate was a “Scaring Major”, but not necessarily Sulley. When Mike meets his roommate, he is wearing a hat and carrying books; not so when he meets Sulley. Also, in the “Pig” clip, Mike meets Sulley when the pig comes into the room, and Mike semi-politely asks Sulley to leave so he can study— implying that it is NOT Sulley’s room too.
GUYS, I’M GONNA’ FLIP I THINK MIKE AND RANDALL WERE ROOMMATES.