There wouldn't be ay Trek novels.
Titan seems to be the go to company for tie ins right now, so I wouldn't be surprised if they got the license if Pocket lost it. Their magazine division even publishes or published the Star Trek Magazine so they already have a bit of a Trek connection.Well, not as we know them. Another publisher could get the license. It's unlikely that it'd continue from wherever Pocket left off (logically, if in this hypothetical, CBS was happy with how the Trek books were going, they'd just have Pocket keep the license).
As I recall, "Cold Equations" was initially concieved as a grand finale to the novelverse, when Pocket's license was nearing its end.