But for Leonid Brezhnev, the Soviet Union would have won
I doubt if they'll cover his cancellation of the UR 500 program, or S.P. Korolev's earlier diversion of the TMK. This documentary will reflect a US perspective, and a limited one at that.
For that matter, I doubt if there will ever be a good documentary on the cancellation of Apollo.
After all, who would watch?
It would be as popular as a documentary on the delusions about Mars.
There also won't be a documentary on the adoption of solids for the shuttle, nor on von Braun and Hitler.