Admittedly you're right there's not a ton of proof yet that it'll be deep enough with enough stories to truly be considered a full game in terms of length but there are a number of articles like this who played the demo and then talked to the Ubisoft staff making the game and Ubisoft isn't some small publisher that won't get a ton of flack and negative press for trying to sell something
overly short at full game price while something like the Batman game is going for just $20:
http://www.cnet.com/news/star-trek-bridge-crew-hands-on/
And notes like this:
- Coming out of warp into the middle of a giant debris field, the wreckage of a space station in front of a sun about to go nova, is one of the coolest things I've seen in VR so far. And to think that Ubisoft is pitching this as a full game, one with a story, makes my inner Star Trek fan squeal with joy. I just hope Ubisoft has enough depth and enough scenarios to keep it entertaining for a good long while.
- While there'll only be four roles -- captain, helm, tactical, engineering -- at launch, there might be more later. Ubisoft narrowed it down to the current roles to make sure each player would be constantly communicating and always had something to do.
- Though the game's premise is that the Aegis is on a mission to find a new homeworld for the displaced population of Vulcan, that's "just the launching point for the story."
- In addition to the story, you can randomly generate missions as well.
- You can play with AI instead of friends with VR headsets, if need be. They'll respond to basic commands and issue basic status updates, and you can jump into their roles temporarily. (Edit: Clearly I assume this will be playable online so you don't need multiple people with headsets and systems like in the Star Trek stars video, if you do want to play multiplayer)
- Tate says each crewman's station also has advanced features that have yet to be revealed.
- Combat isn't the focus of the game. "Combat is an essential part of Star Trek, but it's never the point of anything you're doing. It's always the thing getting in the way," says Tate. Instead, expect exploration missions, rescue missions, and more to be revealed later this year.