Dragon Ball Z: Kakarot actually explores an overlooked part of the Future Trunks arc with its newest DLC expansion! Kakarot has already done a number of things to expand upon the canon of Akira Toriyama’s original manga series with new characters, scenarios, answered questions and more, and this continues with the DLC expansions adding new material to the games.
With Future Trunks’ return to the franchise in Dragon Ball Super, we had discovered that not only did Trunks deal with the Androids and Cell in his timeline, but that he had actually trained with the Supreme Kai for a short period in order to stop Majin Buu from reviving.
Trunks confirms this is the case as he fought against his own version of Dabura and Babidi, but unlike the version of the fight we see in the main timeline, Trunks was able to quickly defeat both of the threats thanks to the Supreme Kai’s help.
So while the Trunks DLC was already interesting as it adapted the Future Trunks side story of the original Dragon Ball Z story, it managed to slip in some Dragon Ball Super lore as well since it also takes place at the same time as the Dragon Ball Z developments.