Gran Turismo Horizon LMAO
Not the Game, just a mode. Kazunori Yamauchi spoke about it in a old interview. He clearly said he was open to such a possibility. Of course it cannot be like Forza Horizon; don't be silly.
”Every great dream begins with a dreamer. Always remember, you have within you the strength, the patience, and the passion to reach for the stars to change the world.”