I came across a notice on the Microsoft store that there will be launch events for Forza Motorsport 7 on Thursday September 28. It might be limited to stores in the US, and maybe not all stores will run the event. If you're interested I suggest looking up whether there's a store in your area that will be running it. Here's how it's described for one of my local stores:
"Celebrate the launch of Forza Motorsport 7 with Microsoft Store at an in-store launch event and Forza Motorsport 7 time trial competition! Put your Forza skills to the test for a chance to win exclusive in-game driver gear and Microsoft Store gift cards.* The tournament beings at 6:00 PM. Registration begins at 5:00 PM. Tournament participants must be 13 years of age or older.
* No purchase required. Open to players 13+, some restrictions apply. See store for full Official Rules."
Might be a fun way to have some fun, get an early look at the game, and maybe pick up some nice prizes!