The Portuguese has struggled to hit the heights with the La Liga side this season after becoming the first ever Spanish side to break 100 points last term to secure the title.
Mourinho has been rumoured to be in line for a return to England with Chelsea but he is keeping his cards close to his chest as he continues to keep everyone on their toes.
He left the San Siro in 2010 after winning the treble and he has never closed the door on a potential return, still calling himself an 'Interista'.
"I have an adventurous spirit and do not know what will happen next season. It's not easy to choose a new destination after working in England, Portugal, Italy and Spain," Mourinho said.
"Maybe I could return to somewhere I've already been. Watch out for surprises. The unimaginable could happen."