I would have laughed - and cheered - if the Name of the Doctor, after all that drama, turned out to be simply "John Smith." (Or more likely Jonsmith, in Gallifreyan parlance.) The oldest question in the universe, hiding in plain view - well, guess what? So was the answer. Would have added more weight to Eleven's speech in the end about his real name not being the point. Or, to borrow from Batman, "It's not who I am that matters. It's what I do."