... Tony Stark fighting with “Captain America’s alter-ego Steve Rogers (Chris Evans) as they feud over the Superhero Registration Act, which forces anyone with superhuman abilities to reveal their identities to the U.S. government and agree to act as a police force for the authorities.

Stark supports the program, but Rogers does not, saying it threatens civil liberties, causing sides to be taken and Rogers, among others, to go on the run to avoid arrest.

The moral question and battle with his Avengers teammate essentially makes Stark a villain of sorts.”

http://variety.com/2014/film/news/robert-d...ive-1201312229/

He revealed his true identity

It begins with Falcon, Cap and Widow monitoring a marketplace. “Red wing activate!” says Falcon! He’s got a drone version of his comic book falcon sidekick! The drone goes under a truck and scans it. There’s something built into the design of the truck.

“It’s a battering ram,” says Widow. “Move now,” says Cap. Falcon leaps right off the building, falling and activating his wings just before he crashes. Widow runs through the marketplace with lots of flips and martial arts action. Crossbones is standing in the center of the marketplace, Cap starts to fight him. Crossbones is angry about what Cap did to his face, but Cap knocks him back, knocking his mask off. Crossbones says something about Bucky and it grabs Cap’s attention. We hear General Ross’ voice, “The world owes you an unpayable debt,” he says. “But some people use the world vigilante. People are afraid.”

We see Bucky in the same room from the end of Ant-Man. A quick shot of Scarlet Witch. Vision, dressed in a tuxedo sitting by a chess board. There’s a funeral. The coffin has a Union Jack on it. Tony Stark looks at Cap, “Sometimes I want to punch you in your perfect teeth,” he says.

“Without boundaries,” Stark says, “We’re no better than the bad guys.”

“So far nothing has happened that can’t be undone,” says Ross off camera.

There’s a shot of War Machine with Iron Man! Cap’s team gathers. Falcon, Scarlet Witch, and Hawkeye are there. Hawkeye vs. Black Widow! “We’re still friends, right?” asks Widow. “It depends on how hard you hit me!” says Hawkeye. In a parking garage, Falcon opens a van’s door. Scott Lang is inside, asleep. He jumps up and is super-excited to see Steve Rogers. “I’m shaking your hand too long,” he says, overjoyed. “I know you, too” he says to Scarlet Witch, unable to take his eyes off cap, “You’re great.”

“I know you know a lot of super people,” says Lang. “So thinks for thanking of me! I mean, thanks for thinking of me!”