The last scene of Journey’s End was sad, wasn’t it?
There was the Doctor, friendless and alone, sad at having no choice but to wipe Donna’s mind, drifting away in the TARDIS with tired, sad eyes.
Run Christmas 2008 trailer.
However, it may not have been originally planned that way – after all, on two occasions now (leading into The Runaway Bride and Voyage of the Damned) the Doctor’s last words on screen were "What? What?! WHAT?!"
Of course Cybermen appearing in the TARDIS might have been quite a major surprise, nevermind that they appeared in the trailer. And the alleged security of the TARDIS has been looking mighty dubious recently, with walls blown down by space ships and huron particles bringing future companions into the picture.
So all we’ve got for now is the accompanying photo, with a suggestion that the scene may be restored for the DVD release – not an entire surprise as Journey’s End was rather long.