Dragon Ball Z: Kakarot's sixth DLC, based on information from a reliable source, will feature the End of Z Saga, also referred to as the Peaceful World Saga. It is important to mention that the fifth DLC, centered around the 23rd World Martial Arts Tournament from the original Dragon Ball anime, has not been released yet and its release date is unknown.
Considering the significant gaps between DLC releases in Dragon Ball Z: Kakarot's first season pass, it is not surprising that fans can only speculate about the release dates for both DLC 5 and DLC 6. While there is some excitement surrounding the 23rd World Martial Arts Tournament, it appears that the Peaceful World Saga may not generate as much anticipation, as implied by its name. The Peaceful World Saga serves as a brief conclusion to the original DBZ anime, often perceived as the concluding segment of the Majin Buu Saga.
Fans will get the chance to play the Saga in Dragon Ball: Z Kakarot, as revealed by reputable leaker @DBSHype. This leaker has previously provided accurate information about the game, including details about the pre-release and first season pass. It's worth mentioning that @DBSHype stated that the rumored Dragon Ball Super/Dragon Ball GT content will be included in the next Season Pass. It's not surprising that DBZ: Kakarot is receiving strong support, similar to Dragon Ball Xenoverse 2, but it's difficult to speculate on the specifics of what the Peaceful World Saga will encompass.
In terms of battles, it is likely that fans will get to experience Goku vs. Uub and maybe the spar with Trunks, Goten, and Pan. That's essentially the extent of it. It's possible that the game may allow players to participate in the events before the time skip, but there isn't much exciting content in that aspect. @DBZHype does mention that the developer will be adding additional content to compensate for its short length. However, this is still a surprising choice considering the abundance of DBZ and Dragon Ball Super content available to choose from.
The 23rd Martial Arts Tournament marks the beginning of Dragon Ball Z while the Peaceful World Saga concludes it, making DLC 5 and DLC 6 fitting bookends. It raises curiosity about how this will connect to the rumored Dragon Ball GT content and the future of DB Super, given that they are distinct entities. Dragon Ball Z: Kakarot is currently available on PC, PS4, PS5, Switch, Xbox One, and Xbox Series X.