I seriously doubt anyone beyond the core fandom purchases any of the animated missing serials so I think that argument is rather moot. I don't think the general viewership is going to care that much of the difference in story of a fifty-year old, black-and-white animated story featuring a TARDIS team they probably aren't familiar with. If they've gotten that far, the nature of the story probably won't matter much. The only people who will really care is the fandom.For dedicated fans and people interested in the series's history, sure. But that's presumably not a large enough segment of the audience to make it profitable. As far as the general, more casual viewing public is concerned, a purely historical story with no science fiction elements wouldn't be as popular. That's why the show stopped making pure historicals in the first place.
Ah, that's good to read. Sounds like The Macra Terror might be like Enemy of the World as I described up thread.I expressed curiosity on Facebook over why "Macra" would've been chosen, and to my surprise, I got replies from both Gary Russell and Robert Shearman saying it was one of the best Troughton stories.