Then there was the second part of the rumor. This is the one that really got me thinking about how brilliant it could be. J.K starring in an episode and the characters from her books coming to life. Could you just imagine Voldemort battling The Doctor? Dumbledore and The Doctor having an intellectual conversation whilst the companions watch completely lost. Ron in the TARDIS saying "Blimey."
I hope this happens one day. Please leave your thoughts in the comments.