wow! Peter has lost weight since Time crash! With a little hair dye he could certainly pick up in a classic role sort of way, a bit cameo again! I think with make up these days, and prosthetics, they could make him look about 20 years younger, like they did in Lord of the Rings, when we see the flashback of Bilbo Baggins, and the impeccable job they did there.
Honestly if Sylvester McCoy and Colin baker lost weight, give Colin a curly wig, and maybe added a bit to Peter's hair line with hair extensions, they could all do pretty close to looking the part of a seasoned Doctor out of Time..and not too aged to be out of scale with minimal time aging from them being together..I mean, the 50th was nice and all and answered the Question for the Time War problems, but wouldn't it be nice to get the entire surviving Crew out there in one more blast before it gets too late.. I mean a missed opportunity was certainly Tom Baker's absence in the 5 Doctors..
I would like to see these fine past Doctors come back as looking lean and mean, and ready to deal damage to their ultimate nemesis once more. Omega! Now that would be my vote for this year's Doctor Who fan wet dream!
