The official BBC site has announced Ben Wheatly as the director for the first two episodes of series 8, which begins filming in December, He has said:
I am very excited and honoured to be asked to direct the first two episodes of the new series of Doctor Who. I've been a fan since childhood (Tom Baker is my Doctor if you are asking). I've been watching the current run of Doctor Who with my son and have discovered it all over again. The work that has been done is amazing. I'm really looking forward to working with Peter Capaldi and finding out where Steven Moffat is planning to take the new Doctor.
It is also rumoured that a colleague of Russell T. Davies, Frank Cottrell Boyce is writing a script for a future episode.