Either way, it'll be a bonus to the actual happenstance of having the actual remaining 20th century doctors present interacting (or so I hope that they do). I do think Christopher is right, though, and its dissapointing that they're self-imposing that double standard of theirs on the 50th anniversary - they could have easily done away with it, just for this momentous occassion.
And to note, David Troughton isn't outside the Big Finish family. Pretty sure he's done Big Finish audio dramas too - not as the Second Doctor, of course.
And to note, David Troughton isn't outside the Big Finish family. Pretty sure he's done Big Finish audio dramas too - not as the Second Doctor, of course.