The Illuminerdi claims that “Star Wars: Ahsoka is looking to cast Barriss Offee. She is listed as a lead character in her 20-30 and they are looking to cast an Asian woman for the role.”
This site had its hits and misses regarding rumors, so we’ll have to wait and see if it’s true.
Barriss first appeared as a Padawan learner in Star Wars: Episode II – Attack of the Clones (played by Nalini Krishan), but she was mostly developed in The Clone Wars. She became friend with Ahsoka Tano, but then grew disilusioned with the Jedi Order’s role in the war, and she gave herself to the dark side. For now we don’t know what happened to her after her imprisonment by the Republic during the war.
Star Wars: Ahsoka will be set within the timeline of The Mandalorian, about 30 years after the Clone Wars.