The problem with Star trek is that their no one with any vision leading it and all the studios who own seem to demand is more action please, can we had some pop music into a scene and how about some product placement, can you go darker please. An they all seem to be hook on using old TOS characters, now that seem to have start to dry up, and with due respect to Patrick Stewart they have move onto stng characters, no one is moving the franchise forwards with new characters, new technologies and new ideas.
There stargate but MGM seem to be willing to let that rot.
Alien which Fox haven't got a clue what to do with and Disney won't do anything with it because it not kids friendly.
Predator which is the same as the above really but that got a new film coming out this year, which I expect will be the last film of the franchise as again Predator doesn't fit with disney family friendly image.
But outside of Predator, Star trek, star wars and alien there is no large scale sci fi franchise and four of them are own by companies who don't have a clue what to do with them.