As it has happened for past SuperBowls, the AFC champeen - the Colts - will be using the Dolphins facility when preparing for the big game. The Dolphins noted that they intend "to protect confidential information" while the Colts visit.
Now I understand! Saban knew this was going to happen and was afraid that his buddy (Bellicick) would be the AFC champ and would have free run of the place. And Saban couldn't stand that idea!