The first teaser trailer and poster for "Captain America: Civil War" have just been released by Marvel and undoubtedly, it has exceeded all expectations.

The trailer showcases the reunion of Cap and Bucky, which creates quite a furor among SHIELD and other Avengers, especially Black Widow and Iron Man.

From the look of the teaser, it seems that Cap finds Bucky working in an unknown warehouse and warns him that people (seemingly SHIELD) are coming to get him.

Afterwards, the trailer shows Cap and Bucky on the run and some government agent declaring Cap as a vigilante. Even Black Widow is reluctant to trust Cap.

Eventually, Tony Stark aka Iron Man enters the scene and for the first time in entire Marvel Cinematic Universe's history, Cap seems to be scared of Iron Man. What could be the reason behind Cap's fear?

However, the most important feature of the trailer is the appearance of Black Panther, who is seen in glimpses beating people in a frenzy. Black Panther will be joining Cap's team along with Falcon and Hawk Eye.

So what's the fight about? Why Cap and Iron Man are fighting each other in the first place? As the trailer mentions, it is about a new government registration policy.

It seems that the government thinks the whole superhero project like Avengers is a threat to humankind and therefore, all superheroes must be registered so that the government can keep a track of them.

However, Cap, along with fellow Avengers Hawk Eye and Falcon, disagrees to the proposal as he is seen stating that it will only pose a threat to them.

Nevertheless, not all share and support Cap's protest and most prominent of them is the renowned business magnate Tony Stark, who also goes by the name of Iron Man. He is backed by War Machine, The Vision and Ant-Man.

Here is the official synopsis of the movie:

Captain America: Civil War plot picks up where Avengers: Age of Ultron left off, as Steve Rogers leads the new team of Avengers in their continued efforts to safeguard humanity. After another international incident involving the Avengers results in collateral damage, political pressure mounts to install a system of accountability and a governing body to determine when to enlist the services of the team. The new status quo fractures the Avengers while they try to protect the world from a new and nefarious villain.

"Captain America: Civil War" is all set to be released on 6 May, 2016. It will star Chris Evans, Robert Downey Jr., Scarlett Johansson, Sebastian Stan, Anthony Mackie, Paul Bettany, Jeremy Renner, Don Cheadle, Elizabeth Olsen, Paul Rudd, Chadwick Boseman, Emily VanCamp, Daniel Brühl, Frank Grillo, William Hurt, and Martin Freeman.