I'm one of those people the really enjoyed the Star Trek 2009 reboot.... BUT I still think that movie is vastly overrated, filled with crippling amounts of plotholes and immersion-breaking coincidences, a very weak central plot, and number of distracting cameos from other actors (Tyler Perry? Seriously?). It spent 99% of its time "rebooting" the universe only to send that time putting the characters, through sheer coincidence and acts of fate, right back into the exact same roles their other-universe counterparts had, to the point that we KNEW everyone was going to adopt "their role" and we just had to waste time waiting for it to happen... and when it finally did, the movie was nearly over.
It still had some great scenes and the acting was, well... let's just say its more genuine than the originals. Still a good movie, but I'll probably never fully accept that Kirk gets marooned on a moon in the whole giant universe, stumbles into a cave on the whole giant moon, runs into Spock from the future in that one cave, and then also coincidentally bumps into Scotty, who is on that same moon a mere few meters away...
Concerning this film, I'm sure it'll be like the first (or the Dark Knight Rises), in that the overall film will be pretty enjoyable, but it just will lose me in the little details and collapse under the weight of plotholes, directionless scenes, unnecessary twists that serve no actual meaning, and aimless scenes that don't so much develop characters as repeat things we already know about them.
I think J.J. Abrams is decent... but he's not the 'savior' of the franchise, nor some brilliantly skilled director, or even someone with any real understanding or respect for the franchises he attaches himself to. It's mainly the work of all those around him that elevate the mundane material into something truly interesting, much like how Robert Downey Jr. turned what could've been another Daredevil or Ghost Rider into a role that elevated him (and the character of Iron Man) to a global hit... even if I acknowledge the actual movies would just be alright without him.
I guess I'm just trying to say that I have a healthy skepticism about Abrams taking on Star Wars. We need something truly NEW in the Star Wars universe and if Star Trek Into Darkness is an example of Abram's priorities, he seems incapable of going "where no man has gone before" and instead is opting to return to "where this franchise has already been several times before".
And say what you will about the Mandarin twist in Iron Man 3... at least people didn't see it coming. EVERYONE called out the "twist" in Star Trek Into Darkness nearly a whole year before we got to it.