But after 5 seasons they can also get new actors. From the main cast, other than Spock, Uhura, Chapel and M'benga to a lesser extent, all the other characters are expendable and don't have to continue for a proposed sixth season. They can be replaced by Kirk, Scotty, McCoy, Sulu, Chekov, Rand, Kelso, and any other first season TOS character they want. That would make far more sense than to end SNW and start a new show on a completely different Enterprise with a completely different cast. The fact that that's not what's happening, makes it seem pretty clear that they have no intention of making another show like 'Legacy' (or 'Year One,' for that matter.)