DRAGONBALL Z GOLDEN AGE - Chapter 3.5 - Ascension [Fan Manga][Comic] (Patreon)

To all those wondering how this portion occurs in Golden Age, it happens at exactly the same time the Intergalactic Martial Arts Tournament during the Bojack Arc.

While Gohan and the others are competing in the tournament, getting ready for the finals, and preparing to take on Bojack when he invades, across Universe 7, the remnants of the Freeza Force and Planet Trade Organisation are attempting to run damage control to their crumbling grip on their part of the universe.

With Freeza and King Cold gone, planets under the Empire's control are starting to rebel. Now faced with this crisis, as well as dealing with a civil war between themselves and other factions, a desperate Sorbet is then approached by Berryblue, who offers him a very simple solution.

The return of the formerly exiled Prince Cooler!

Ladies and gentlemen, Cooler is now canon to the Dragonball Z universe (at least mine).