It's being rumoured that Forza Horizon 3 is real and will release from Playground Games on September 27, 2016.
According to the site, the game will include the largest roster of cars ever seen in a Horizon game, including the Lamborghini Centenario.
We are also told that the game will include the largest open world ever created by Playground and that it will be set in Australia. This will include driving on Extreme terrains.
Finally, it's said to include a 4 player campaign co-op and be exclusive Xbox One & Windows 10.
File this under rumour for now.