Microsoft has confirmed that Forza Motorsport 4 will be released in autumn 2011.

Alongside the announcement, comes the debut trailer, which doesn't show any gameplay footage, but does hint at some of the changes we might see in the next instalment, including dynamic weather effects and rallying.

Microsoft also confirmed what it announced at E3 earlier this year: Forza 4 will feature full Kinect support.

Check out the trailer.