Kanno Yoko (https://en.wikipedia.org/wiki/Yoko_Kanno) is a Japanese composer, famous for her work in Cowboy Bebop, Ghost in the Shell: SAC, Macross Frontier, and many many others. However, she hasn't been in charge of the music for an anime since 2014's Zankyou no Terror.

She hasn't disappeared though: Since then, she has composed a song for Japan's Emperor Enthronement Celebration (https://www.animenewsnetwork.com/interest/2019-11-12/yoko-kanno-composes-song-for-reiwa-emperor-enthronement-celebration/.153158), and soundtracks for two TV dramas, a game and the Cowboy Bebop Netflix adaptation. She has also composed a couple of tracks for anime.

Will she produce a new anime soundtrack before the winter season of 2026? Only anime that are full cour resolve to YES (i.e. at least 10 full episodes) and she has to compose at least more than 50% of the music (so the OP and ED themes could be someone else's, for example). If the hypothetical anime comes out on winter 2026, even if the episode airs on the last days of 2025, the question will resolve to NO.