And they apparently blocked it because of future movies.
No, they absolutely did not. That is nothing but a fan conjecture that refuses to die even though it makes no damn sense. Nobody has ever cancelled a novel because it might contradict future productions. They either rewrite it or they just let it get published despite the contradictions. It's happeened countless times with previous Trek books, so it bewilders me that anyone would fall for such a ridiculous speculation in this case.
The books were not cancelled because of their content. That had nothing to do with it. It was because of larger issues of company policy. Basically, Bad Robot preferred to generate tie-in content in-house under its close supervision, which didn't mesh with Pocket's creative approach (or its location on the other end of the country).