[Stuart]

Surely Paul being nearly 30 years older than when his film was name though makes it a non-starter.

I think it's difficult enough for them to bring back David Tennant for the 60th anniversary, as he's already appeared again in the special with Matt Smith and John Hurt 10 years ago. McGann only appeared then as a link to the War Doctor character plot line.

David Tennant was certainly a very popular Doctor, but coming back over and over again makes me wonder why he bothered leaving in the first place.
(PS: the tartan pants look silly)