It's mostly just Big Boss running around in a cardboard box -- y'know, the usual -- but that'll do. I got a kick out of the ending in which, after popping out of the box for a holdup, he runs away.
Kojima also showed a poster (via Kotaku) that compared the map sizes of the various Metal Gear Solid games, and let's just say The Phantom Pain is way, way bigger:
That whole brown area all of the colored splotches are on? That's Phantom Pain's map.
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