The fourth episode of Ahsoka ends with a return to an infamous Star Wars Rebels location, but this may actually be paving the way for the continuation of a story arc from Star Wars: The Clone Wars. After a brutal lightsaber duel with Baylan Skoll, Ahsoka found herself defeated and cast into the raging seas of Seatos. When she awoke, she was once again in the World Between Worlds, the mysterious Force realm that exists beyond time and space. Here, she was reunited with her former Jedi master, Anakin Skywalker, suggesting that the World Between Worlds is, in fact, part of the Netherworld of the Force and Ahsoka has died.
Source：https://www.cbr.com/ahsoka-pay-off-clone-wars-story-arc/
