The fate of Ahsoka Tano is still left a mystery in Star Wars Rebels, but before climactic clash with Darth Vader in the finale, it was revealed that she had a scene with the force-sensitive Bendu from Season Two.
Star Wars Rebels showrunner Dave Filoni tweets the scene:
It may come out as the Bendu being a bit passive-aggressive, but since we did see Ahsoka walking deeper into the temple, this could foreshadow her eventual death in the show, or even the death of someone else.
A lot of people are guessing that Ahsoka will die for sure at some point in Star Wars Rebels, but the deaths could also pertain to the members of the Ghost crew like Kanan Jarrus or even the show's protagonist Ezra Bridger.
We already know that Hera and Chopper have been confirmed to be alive in Rogue One: A Star Wars Story, and with the next season being the final one, I'm guessing Filoni and the other showrunners might want to end it with an emotional bang—just like Rogue One did.
Star Wars Rebels season 4 airs on Sept 23.