Netherworld is where everyone goes after dying regardless of species, morality
or Universe; divided between heaven and hell, with many sub-realms. There is
a little bit of everything in this alternate dimension of death; governed by Shinjin.
Focused on the "main" Universe from canonDragon Ball but many centuries in the future, where none of the original cast are alive but their contributions have an everlasting effect for the sake of continuity. It retains all the associated hallmarks.
Focused on a Universe where Earth was destroyed in the far distant past, and a prominent result is that most races have taken a different path for development in the absence of humanity. It is the "twin" of Universe 7, paralleling its essentials.
Focused on a Universe where humans are considered the most powerful martial artists, tactically using a minimalist's arsenal of techniques to overcome adversities like being outclassed when it comes to Ki level. Not much else is known about it.
Focused on the "alternate" timeline that diverged from Universe 7 when Goku died of a viral heart disease, leading to a reign of terror at the whims of Dr. Gero's chaotic androids; origin of Future Trunks. Only Universe to allow time-travelers.