Newer specials like this, but multi-doctor ones this time!
I think a neat idea, if this was to be ever done again, would be to have a special "Four Doctors" episode with the right storyline. This would be the cast:
Tenth Doctor - voiced by David Tennant
Eighth Doctor - voiced by Paul McGann
Third Doctor(as portrayed by Jon Pertwee) - voiced by Jon Culshaw
Second Doctor(as portrayed by Patrick Troughton) - voiced by Frazier Hines