Nobody said anything about there being no further Trek productions, did they?Is it really realistic to believe Paramount would okay a relaunch/re-imagining of TREK without even the consideration of follow-up films?
Is it likely screenwriters hired to write a new TREK film would not have in mind or plan the future of the franchise?
Is it likely Paramount would, if the film is successful, change said creative team for future projects?
If you were to make a new TREK film, would you make it with the idea that it be the only one or would you plan ahead for others?
The logical fallacy there is assumed that "Star Trek" always equals "what we already have."
There's a sound BUSINESS justification for returning to the TOS characters for this movie. Partly to eliminate one variable from PPC's "reevaluation of the franchise" equation, and partly because THAT IS WHAT JJ ABRAMS SAID WAS HIS CONDITION in order to go work for PPC for a series of (non-trek-based) movies.
Got that? PPC didn't go looking for someone to do more Star Trek. No, really... they DIDN'T. They were entirely prepared to let Star Trek lay fallow for the foreseeable future, with NO new series, no new movies, NOTHING, forthcoming.
Abrams asked to do this film. This ONE film. And he said that it was the film he wanted to do... other films in the "package deal" he was going to sign with PPC wouldn't be defined until they came up later, but this one was his CONDITION for doing the rest of 'em.
The story he said he wanted to tell was a story he'd first come up with when he was in his mid-teens (he's the same age as I am)... right after TWOK came out.
Everything we really KNOW so far leads us to conclude that whatever he's doing really is related to ideas from TWOK (including Kirk's Kobayashi Maru test). Which supports the above idea pretty clearly.
I think you're putting WAAAAY too much priority on PPC trying to do "the franchise." 99% of all movies made have nothing to do with a "franchise" yet they often get as much, or more, funding and emphasis than this film has.
First, and foremost, PPC wants a successful film. If it's really good, they may decide, THEN, that they want more along the same lines as this one. Or they may decide to use that as an argument to "spin off" into another direction. WE DO NOT KNOW... BECAUSE THEY DO NOT KNOW.
They don't even know if Star Trek is still a possible moneymaking venture anymore. Most of them had decided that it wasn't, remember. Only Abrams' insistence on doing this film convinced them to give it another shot.