Go ahead, laugh...
Done yet? No, okay I'll wait...
Okay seriously, Star Trek novels are little more than commercial fan fiction. With expanding series such as New Frontier, Starfleet Year One, and others, you don't even have to write about the regular cast of a series anymore. You can make up your own and (with permission from Paramount) make money writing about it.
I'm probably going to get flamed for this post being about what it is. As a fellow fic writer, I know the credo of doing it for fun, not money. But some of the fan stuff I've read is good enough to be publishable! Hell, I've even thought of doing a novelized series.
Just something to think about.