Unearthing the most obscure Doctor to tell a story that, for the most part, has already been told doesn't sound like something that belongs in Doctor Who, in my opinion. Or at least not on a TV screen.
Couldn't have said it better myself.
We know how the Time War ends, it'd be as pointless as the SW prequels, and I appreciate people like McGann, and it is bad that we only got to see 90 minutes of him, but the past is the past, by all means drag him back for an appearance, drag any of them back, but trying to build a film or a series of films around an older Doctor. I mean I'd love to see more Davison but it would be essentially pointless.