I don't think that's true. It doesn't agree with what little I know, and I can't recall even reading it as a rumor before. Paramount licenses the characters, concepts, terms, etc. of ST from CBS, and has a copyright on the films they create and thus retains the right to things that originate in those films (e.g. the Kelvin, Nero, Keenser, Starbase Yorktown, etc.). People speculated all sorts of nonsense at the time. I never heard a single fan guess the right answer. As I said, this particular speculation is one of the dumbest ones out there, because if it were as simple as that, we could've just rewritten the damn books!! And because the risk of future contradiction has never, ever, ever prevented a tie-in from being published before, as anyone who's read TNG: Ghost Ship or DS9: The Siege can attest. That's axiomatic, because no book gets written in the first place unless CBS approves the proposal. I think that would be a matter of the overall license agreement, not the approval process for specific books. But it wouldn't explain what happened with the Kelvin Timeline novels. Again, if the books hadn't been approved initially, we wouldn't have written them at all. They were approved, we got the go-ahead to write them, we wrote them, the manuscripts were accepted and paid for in full... and then the approval was revoked for some reason. That's what's so anomalous about it. Either somebody somewhere changed their minds, or some new factor came into play after the fact, or something. In any case, the decision to cancel the books was not about their specific content. That should be obvious from the fact that all four were cancelled at once. From what I understand, the cancellation was for behind-the-scenes business reasons that had nothing to do with the actual stories.