Courtesy of the reliable Nerd-Leaks, it looks like Forza Horizon 3 will be releasing 27 September on Xbox One and PC.
They note the following details:
- The game is set in Australia
- It will feature Extreme terrains;
- The largest open-world ever built by PG;
- Largest car roster ever seen in Horizon;
- 4 player campain co-op;
- Exclusive Xbox One & Windows 10;
- Available September 27, 2016.
— NerdLeaks (@Nerd_Leaks) June 13, 2016