Every generation alters and retells the stories that were given to them. The Doomsday Machine Episode is no different IMHO and if I had to choose one episode from TOS to remaster this would be my choice too.
As I recall as long as Spacecadetglowuk is credited it can be released. That also goes for Atheorhaven, unless he's recently changed his policy; he originally rescaled this anyway.
Speaking of Doomsday Machine's in SFC... Tracey G had a really good TDM based mission that was multi-empire playable somewhere on the Script forum.
IMHO... the Doomsday Machine missions should only be playable in nebula hexes as any other space terrain allows the planet killer to be wiped out by anything the size of a fighter or a shuttle... Maybe Nuclear Wessels will convert the SFC1 campaign to SFC: OP.
Qapla!
KF