^^ Nah, it would be cool to include the older Doctors as well. It's very easy to include a reason for the older appearance. And, it's a celebration of the 50 years, not just the last 8.
Mr Awe
It's mostly a celebration of the last eight. I'm guessing that Eccleston would have been included if he wanted the job, but not any of the older Doctors.
Which is fucking ridiculous. If they wanted to celebrate the 8th anniversary with a New Who, they should've release a special on the anniversary of Rose. They're not; they're releasing it on the 50th anniversary of An Unearthly Child. This should be a celebration of Who in all its forms from beginning to the present, not any particular era.
That said, I'm still not entirely convinced we WON'T in fact get any classic Doctors or companions, but a celebration of 50 years that "mostly" celebrates the latest eight is just insulting.