Therefore, its known narrative elements are not a part of the Doctor Who universe as we, on this Wiki, choose to define it. It may have been the basis for a similar story in another medium, however — and that story may indeed be valid.
It was intended as a spiritual sequel to PROSE: Who Killed Kennedy but focused specifically on the events of TV: The Tenth Planet. Several characters would live through the real world events of the Cyberman attack, from the appearance of a strange new planet to worlwide power failure ("Hospitals lose all electricity, patients die on operating tables"), and finally street battles worldwide as the Cybermen arrive to abduct people. The pitch refers to the characters being "a priest who has lost his faith", "an investigative journalist undercover with an eschatological religious cult", "a military advisor at the Pentagon searching for his missing daughter among the chaos" and "a scientist willing to sacrifice anything in her quest for knowledge", with a version of the Doctor having to choose whether to intervene.
The pitch was rejected due to the cost of licensing the Cybermen. Bishop reworked the pitch for Big Finish but it contained too many speaking characters to be viable for audio.