The Wormhole wrote:
Thing is, I thought Big Finish isn't really allowed to do anything related to the new series?
They're not. The quoted words "behind the project" may mean that the "support" the project, not that they're a part of it.
Tennant has been in Big Finish productions in the past. It would be amusing if he appeared in a non-Doctor role as Colonel Brimmicombe-Woode (or whatever the name of his UNIT character is).