I'd prefer it if they did something like that to bring back Paul McGann. I want more Eighth Doctor in live action, darn it!
I've often thought using the 8th Doctor would be a good way of doing one of the "Doctor-lite" episodes, structure it as a flashback story explaining something the current Doctor has to do, ending with him resolving whatever situation 8 had gotten himself into.
I think McGann is probably the only old Doctor you could do that with, as he doesn't have the nostalgic fanbase the others do it would get away with being the cheap episode and the two Doctor's not meeting much easier than if it was any of his predecessors (plus the ageing issue is moot with him as well). Whilst for fans, just having him back would be more than enough.