I haven't delved too far into it and I'm sure there are better sources out there but for what it's worth and certainly as a start http://io9.com/sony-wants-a-robin-hood-cinematic-universe-because-why-1643272757, I think the idea was for various characters to get stand alone movies and origins and stuff. Not sure if this is one of those things that will die out or not but as far as I'm aware it is being discussed.
I know everyone talks about over saturation of Trek but for me that was because a lot of the series ran too close to each other. Voyager episodes were often not too far from tng and the same goes for Ent until it flew off into a nebula to chase Xindi. I think if they did what I said and looked to Marvel as a way to have the whole gell but have each part stand separate it could work. A dark and gritty Maquis series, a comic based on a medical ship.
We'd also have to consider the creative powers that be. As it was, Braga and Berman were simply stretched and exhausted, leading to two lackluster back-to-back movies and the unimpressive Enterprise, which is why all three ended up stinking badly (no love for the product = no quality in the work). The only reason why Enterprise started to get good was because they relinquished more and more duties to other writers until Coto could take over. Indeed, after Trek, Braga's resume started to fill up with more and more acclaimed work (and good for him for doing so).
But the people who are in charge of Trek right now have their own certain intentions, and among those intentions are how far they'd go. Before Abrams left Trek to work on Star Wars, he made it clear that he'd only do a few Trek movies and not stretch it out. The actors are under similar contracts. So fans wanting something is only one side of the equation; creative interest from the franchise's heads is another. If they don't match up, then it doesn't happen (likewise, if the creators are willing but the fans don't care, then nothing happens. That helped kill Enterprise.)
If there was to be a splintered Trek universe like the one you'd want, it would have to take a while to get there simply because the current team would have to finish the next movie and move along. But then you'd also need years to develop it as well; the Marvel cinematic universe didn't happen overnight, it took years of planning and foresight before laying down groundwork, and that was even before they started working on Iron Man 1. And in a few years, Trek might look like a completely different beast altogether as well.