'Captain America: Civil War' the beginning of a series

NEW YORK (WABC) -- The Marvel Cinematic Universe -- what fans call the MCU -- relocated to Lower Manhattan earlier this week to launch the latest Marvel movie.

It is designed to pave the way for many more.

"Part of the point was to get people used to Black Panther for the standalone movie, and so it had to be an introduction that was worth it," said Chadwick Boseman, who plays Black Panther.

Captain America's third movie is called "Captain America: Civil War" because the Avengers have split into two groups of superheroes.

"It goes against what the Avengers are about. It's what makes it controversial, and I'm one of the guys who kinda stirs people up," said Sebastian Stan, who plays Winter Soldier.

One group sides with Captain America, played by Chris Evans, and the other with Robert Downey Jr.'s Iron Man/Tony Stark.

Originally, Stark was a small role, but it grew. "I said, if we're going to do this, then let's really do it and make sure it's one of the best movies."

The movie was made by two comic book-loving kids from Cleveland -- directors Joe and Anthony Russo.

"We were sort of pop culture junkies, Joe and I, growing up," said Anthony Russo.

Joe Russo said, "We really understand the core mythology of these books just based on our own experience with them."

The two brothers directed the movie together.

"It's almost like they share a brain. You can kind of watch them work problems out on set, and you feel reassured that the best version is going to manifest," said Evans.