The Great Wall trailer with Matt Damon looks totally insane!

Right so, Matt Damon has been busy with Jason Bourne exploding into cinemas and a truly epic war movie on the way in The Great Wall.

It's about the incredible feat of building this engineering marvel over several hundred years, which begs the question - what were they trying to keep out? And you'll get some answers in this totally insane trailer.

So... The Great Wall of China was actually the tipping point between humanity and some kind of hideous beasts. Also there were Westerners there for some reason and everybody spoke English.

Who cares, this is the latest from the director of Hero and House of Flying Daggers Zhang Yimou and is the most expensive film of all time made entirely in China, with a budget of $135 million and a mixture of American and Chinese stars. It's going to be absolutely huge, and that's before you even factor in the box office in the West.

In cinemas in 2017.