Board Thread:General Discussion/@comment-1031724-20160910010255/@comment-26884760-20160910180105

Sombra is officially dead, in comics it is an alternate Sombra.. Sombra Prime is dead and not coming back.. no one ever dies in DBZ because it is based on Far Eastern myth, everyone exists in a cycle of eternal life, death and rebirth.. you die in DB and you eventually get reborn (like Buu).

as for villains we know are definitely dead, millions of them..

almost all classic Disney villains have on-screen deaths, many villains from Buffyverse die on-screen too.. they only bring back the "popular" ones, to keep plots going..