We know Wakanda, the home country for Black Panther (T'Challa), has an abundance of Vibranium. Well, Black Panther's claws will be made from the super-strong metal and even his costume will be blanketed in the material. We'll see how dangerous Black Panther can be when he scratches Captain America's shield.
JoBlo later reveals that Steve Rogers is getting a new chainmail armor. I assume Rogers gets an upgraded suit to combat Black Panther.
Besides Vibranium, Wakanda is also known for their advanced technology, which will be evident when Black Panther is seen flying around "sleek Panther jet" that has a "Stark-like" look to it.
In the comics, Falcon has had the odd ability to communicate with birds. Since that nonsense won't fly in the cinematic universe Marvel is giving a more realistic flying sidekick for Cap 3 - a drone. He'll be mentally linked to it, just not telepathically.
War Machine is getting a new "tank-like" armor as well "a new dual weapon that acts as a shoulder cannon/gun that can also be detached and used as a kind of warhammer/baton."
Hawkeye is getting more colorful as Marvel has decided to add more purple to his Cap 3 costume "as well as a full right sleeve to his costume."
The Ant-Man costume Paul Rudd wears in his solo film is old costume Hank Pym built in the 1960s, so it makes sense that he'll get a "more modern/techno stylish costume" for Cap 3. But here is the best part, we've seen Rudd shink into a hero, but for Cap 3 we'll see him grow into Giant Man (about 15-20 ft. height) too. In that bigger form he'll take on "Iron Man and his team." And when he shrinks, you'll see him riding on one of Hawkeye's tricked out arrows.
Captain America: Civil War opens in theaters May 6, 2016.