Earlier last year David Mack, one of Treklit’s leading authors, suggested that To Lose the Earth was the last planned book in the Treklit continuity, as future releases would be centered on the current shows. It appears that a finale of sorts is in the works. From TrekCentral:
Not only does the description of the trilogy sound ominous, but “Coda” literally refers to a concluding passage or section of a work. I can’t say I like the idea of an official ‘end’ to the Trek literary universe that’s grown over the last twenty years: at least if it had died by neglect we could always pretend they’d resurrect it. Now the authors sound like they’re being enlisted to snuff out their own creation.
Ah, well. At least we have The Orville.
Reading Freely 
I get the feeling that Star Trek is essentially unkillable. I mean, they’ve been trying REALLY hard lately but it keeps bouncing back…. Surely they can’t prevent people writing books if they want to? And, more importantly, people want to read them?
CBS/Paramount are fairly diligent about hunting down people using the ST name without permission and giving them a good crack on the head. I’m sure people will continue writing fanfiction set in the primeverse, but no one would be able to write and publish ST books without getting a crack on the head from Paramount. (Paramount killed off ST Axanar, for instance.) I don’t know why they want to strangle the golden goose that is the prime litverse, but considering how moronic the last few movies have been I suppose any stories with things like “real drama” and “character development” are old hat.
I made that comment without benefit of morning coffee, hence my saying the same thing twice. 😉
even i could think of plots that would extend ST indefinitely, so there must be another reason for ending the series… maybe they think they’ve got enough money (not)