Well, no surprises there then.
The preview of the Doctor Who Christmas special on Children in Need showed us nothing much that wasn’t already common knowledge – set at Christmas time in Victorian Britain, featuring something strange with a cyberman-ish face, and David Morrisey as The Doctor.
At the time of writing it can still be seen at http://www.bbc.co.uk/pudsey/ontv/.
Nothing in the teaser makes me change my mind that listeners to Big Finish’s The One Doctor probably have a good idea how this is going to turn out. Though I am hoping for a total surprise, ‘cos I like it when the writers are smarter than smart.