Star Trek can't depend on the we'll-watch-anything-called-Trek crowd for its survival. if that were the case, it wouldn't have been canceled.
But we don't have to worry aout overly-safe approaches in the future, because no space opera can survive on broadcast anymore. Even cheaper and more accessible types of sci fi struggle.
The next show will be on cable or streaming, where the assumptions are different, and the white bread broadcast approach is passť. The next series has to compete for an audience that has seen Breaking Bad and nuBSG.
Not that those shows are poster children for demographic diversity, but what will make or break a new show is being daring in other ways, and by daring I mean just coming up to the modern baseline that the audience expects.