This is the trailer shown at Comic-Con on sunday. It shows scenes of the last two specials titled ''End of Time''. The narration is provided by Timothy Dalton who is rumoured to play a Time Lord.
In the trailer we see the return of fan favourite Bernard Cribbins as Wilfred Mott, his grand-daughter and season four companion Donna Noble (my favourite companion), her mother Sylvia, Ood Sigma and, most importantly, The Master, played by a bleached blond John Simm.
Enjoy and speculate!