It was Orci's planned third Kelvin timeline movie, which would have been about Shatner coming back as Prime Kirk on a quest to restore the Prime Universe, with Kelvin Spock torn between his loyalties to the Kelvin Timeline and the opportunity to bring Vulcan back.
That would have been better than Beyond. But I'm not sure I would want to see Shatner again, or have the idea that the Prime universe somehow needed saving rather than the KT being its own thing.