Re: Orci, Kurtzman and Lindelof should not Return.
TOS said "Under his rule". Which tells his nothing of the nature of his rise to power.
Spock also says that records of the time were "fragmentary". Which means they would likely have an incomplete picture of Khan's rule.
"If I hadn't tried, the cost would have been my soul." - Admiral James T. Kirk, Star Trek III: The Search for Spock