I may as well trot out my old idea....
It's Tennant-centric because it was posted in 2008- not to intentionally diss Matt.
Kelso said:I'd like to see a Turn Left-ish story where some alien screws with the Doctor's personal timeline and creates several alternate (or artificial) realities in which each of the living classic Doctors never regenerated and survived into the new series... basically recreating some of the recent episodes with the old Doctors replacing the current Doctor and seeing how things might have gone differently.
The storylines could be touching and nostalgic (Tom Baker in 'School Reunion'), action-adventure (Peter in 'Smith and Jones'), humorous (Colin Baker in 'The Runaway Bride'), etc.
Of course, midway through the episode all of the Doctors would realize that something is wrong, and somehow cross out of the artificial realities (with their new companions in tow) and join forces with the current Doctor to set things right.
That way you wouldn't have to worry about the changes in the actor's appearances, you could update the wardrobe if needed, and it would supply a hook for the some of the newer audience who might not know (or care) about the older Docs... as they would already be familiar with the current eps. and companions.
It's Tennant-centric because it was posted in 2008- not to intentionally diss Matt.