At this point it is pretty clear that the XBox relationship with Seattle Sounders FC extends beyond just naming rights. Microsoft has used the MLS team to promote Halo 5 and Gears of War 4 in the past. This year, it looks like 2017 Forza Motorsport 7 will be the latest game to be featured on a Sounders uniform.
One fan caught the team doing still and video shoots for the upcoming promotion.
Forza 7 is due to be released for XBox One and Windows 10 on Oct. 3. The Sounders play two home games in October, both after the release date, and one of those matches will likely feature one-off jerseys featuring Forza branding and possibly other marketing tie-ins.