His [Sulu's] lover was Lt. Commander Mandala Flynn, the Enterprise's security chief. By McIntyre's movie novelizations, she'd become captain of the Magellanic Clouds, an extragalactic explorer.
The movie novelizations give the impression that the Magellanic Cloud is a new ship class with new capabilities, and that Flynn is a new captain, like Sulu. I noticed that the Magellan and Flynn are reference in Dreadnought! as well, but that books seems like it's set during the 5-year mission. Kind of curious.