Apparently, Matt Smith is so eager to come back to Doctor Who in a multi-Doctor special that he has already started bugging Steven Moffat about the earliest opportunity for it to happen. Talking to his fans at the Calgary expo, the actor said:
"I love the idea of other Doctors coming back. Also that gives me the opportunity to come back, which I totally will by the way! I'm just waiting for the next anniversary. I spoke to Steven the other day and said, 'What's the quickest one we can do?'"
Smith has been my favorite doctor so far. He was so awesome, and I loved how he played the character. It will be great to see him eventually return to Doctor Who. There’s always the 10th anniversary of the show's revival next year!