Thought this info warranted a separate thread from the George stuff, Gemastsu is usually reliable when it comes to leaks.
https://gematsu.com/2019/05/george-rr-martin-ive-consulted-on-a-video-game-out-of-japan
https://gematsu.com/2019/05/george-rr-martin-ive-consulted-on-a-video-game-out-of-japan
A person familiar with ongoings at From Software has told Gematsu that the project—said to be known internally as "GR" (Gematsu has been asked to only share the acronym) and in development for the past three years—is an open-world title (with horse riding) and collaboration between Hidetaka Miyazaki and George R.R. Martin published by Bandai Namco, which will be officially announced at Microsoft's E3 2019 press conference. While we have not been able to verify this information through additional sources, we have decided to share what we have heard in light of R.R. Martin's blog post.