If Khan had asked for Resettlement rather then steal the reliant What would the result have been.

[Nyotarules]

Spock doesn't get killed; Kirk doesn't steal Enterprise in Trek III to search for Spock; Kirk is not exiled on Vulcan, doesn't return to Earth in Trek IV; humpback whales are not retrieved from the past; probe destroys earth.

Kirk and co use the Enterprise to go back in time and steal whales, the cadets on the ship head for downtown San Francisco to try out LDS. TVH becomes the second movie instead of the fourth