Composer Inon Zur tweeted four photos of his work with the orchestra. He wrote that he was working on a massive new title for the next generation. Apparently, this is not about Outriders, the music for which is also written by Inon.
Most of the players assumed that the composer was working on Starfield. It just fits the description of “massive next-gen game”. Other options include Avowed, the new Fallout, Dragon Age 4, and The Elder Scrolls 6.
Unfortunately, there are no details, as well as hints in the photo.