We all sort of expected that the mystery games "The Phantom Pain" and "Ground Zeroes" were somewhat tied to Metal Gear. We saw that Konami was involved which further increased out suspicion and then Metal Gear creator, Hideo Kojima , tweeted that he was involved which basically a flat out statement saying this is a Metal Gear game. Now at GDC 2013 we have a bad-ass trailer showing off the game and yes, this is Metal Gear Solid V (5 for those who hate roman numerals).
We don't get too many details on the story but we know that out protagonist who we're assuming is Solid Snake wakes up in a hospital from a 9 year coma and stuff is everything is just out of control. There's people who walk through fire, medical patients being executed, you've got one arm, and lots and lots of people dying. It's looks AWESOME. The song playing through the trailer fits perfectly too.
Check it out below.