I ran across this piece by James Berardinelli and in it he suggests that not only could another season of TOS be done, but that folks, like Shatner, would relish the opportunity.
He suggests that the digital technology like that used in Rogue One will be perfected in a couple of years...
there won’t be any technological barriers to bringing together the crew of the Enterprise as they looked in 1969 and allowing them to embark on new adventures. Assuming that the surviving actors (and the rights-holders for the dead ones) give their okay, the adventures denied to viewers 50 years earlier by NBC’s cancelation of their favorite show could come to life by means of this newest wave of special effects.
I'm pretty sure there are more than a few folks that would love to see this... but though I do love TOS... I must confess that I find its stylings more than dated and often the writing was campy. I think I'd almost prefer to see them just go with the TWOK uniform style and kinda retcon the rest of the bridge and tech to be more modern.