...had Moffat agreed to his plan for a "two Doctors" series with him and David Tennant.
Moffat: "Matt told me that he'd worked out this plan that they'd both continue in Doctor Who: do five individual episodes each and three together -- would that be ok? It was a nice plan. I think if I'd said yes they'd have gone for it."
Damn it, Moffat, why did you say no? That would have been the greatest thing ever!
Nah, the prospect of finally getting an older, more mature Doctor is infinitely preferable to just interchanging between two young, zany ones.