Pretty grim huh? Marvel Studios has also posted this synopsis on the movies website:
“Marvel’s “Iron Man 3″ pits brash-but-brilliant industrialist Tony Stark/Iron Man against an enemy whose reach knows no bounds. When Stark finds his personal world destroyed at his enemy’s hands, he embarks on a harrowing quest to find those responsible. This journey, at every turn, will test his mettle. With his back against the wall, Stark is left to survive by his own devices, relying on his ingenuity and instincts to protect those closest to him. As he fights his way back, Stark discovers the answer to the question that has secretly haunted him: does the man make the suit or does the suit make the man?”
The movie is based largely on the Extremis storyline, where Tony Stark is severely beaten by a stronger, faster opponent who is using a test drug called extremis. To counter him, Tony is forced to undergo the extremis procedure himself. During the process he injects himself with a control sheath that allows him to control and apply the Iron Man armor mentally, making him faster and more powerful. In the comics, while it does increase several abilities, extremis is considered a virus that will kill most people it inhabits. Only those with a rare genetic code (like Stark) will be enhanced by it. This is where Ben Kingsley’s Mandarin fits in. The Mandarin sets out to expose large amounts of the population to extremis in order to reshape the human race. He is not aware of the consequences and obviously Iron Man must stop him.
It’s a great story that goes into the struggles that Tony has with all of the decisions he has made, both as a former arms dealer and as a hero, and the consequences that he faces, both personal and on a larger scale. The trailer certainly takes steps in that direction. In addition, we also get a shots of the Iron Patriot armor (most likely War Machine), as well as glimpses of the extremis armor being developed and Mandarin himself. Several screenshots are also available on the website. You can check them out here though too:
Iron Man 3 is set to be released on May 3rd, 2013.