Episode 3x09 spoiler:
“Somehow, Ventress returned.”
https://www.starwars.com/news/bad-batch-interview-nika-futterman-asajj-ventress
No explanation is given as to why Ventress is now alive after dying and being buried in Dark Disciple. The article does say she will return in “future content”, likely in Ahsoka or Tales of the Jedi?:
“Ventress is one of our all-time favorite characters,” Rau says. “So, when Dave brought up the idea of bringing her into The Bad Batch, we were beyond excited.”
“We had several discussions about the book and how her story could continue,” Corbett explains. “How she survived will be revealed in future content, but for this story, we were thrilled to include her and explore her unique connection to, and compassion for, Omega.”
As much as I enjoyed seeing Ventress again this did feel like a cheap move to me. Waving away any explanation of her return from the dead as “a good question, for another time”. It also devalues the stakes in modern Star Wars even further. Sacrifices in stories have no meaning when there are no consequences. So they bring back another cool character from the back catalogue of the dead because they can’t think up a new one, when their simple “go to” is relying on fan service and memberberries to continue the stories instead of creating something new.
and
Ventress’ death in the 2015 novel Dark Disciple:
