I can see it now: David Tennant’s 10th Doctor finally wakes up from the bad dream associated with the Master’s fob watch of the redhead obsessed 11th Doctor, the sad old guitar playing 12th Doctor, and the Jodie Whitaker 13th Doctor. He shakes himself off, picks a new companion and goes back to regularly scheduled programming.
If David Tennant is unavailable, there is always Kris Marshall, Ben Miller, Dylan Moran, and no doubt oodles more possibilities. Maybe someone from the Potter series.
I see several of us have had the same idea!
why not benedict cumberbatch? :)