An Event Cinemas listing for Captain America: Civil War has revealed a runtime of 146 minutes, making it the longest Marvel movie ever. If this runtime is confirmed by the studio, it will be three minutes longer than 2012's Marvel's The Avengers, which clocked in at 143 minutes. Comic Book Movie made this discovery, and it certainly promises an epic adventure that will be unparelleled by anything that has come before it.

Even before fans got to see the first trailer for Captain America: Civil War, many assumed it would be Marvel's biggest movie ever. Almost all of the main Marvel Cinematic Universe characters are coming together for this blockbuster sequel, which will also introduce Spider-Man (Tom Holland) and Black Panther (Chadwick Boseman). After production started last year, it was confirmed that directors Anthony Russo and Joe Russo used new IMAX cameras for part of the production. During an on-set interview with Screen Rant, Joe Russo added some more details about these cameras and how they are being used for what could be one of Marvel's greatest on-scren fight scenes.

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"This whole sequence is in IMAX, it's about a 15-minute sequence. It's the only one that we're doing on the camera. The camera literally just rolled off the press like a week before we started using it. It's an IMAX 65, so it's the ARRI's 65. It's a join camera between ARRI's and IMAX. We're going to shoot all of Infinity War on those cameras."

Unfortunately, we don't have any details about what exactly this 15-minute scene will entail, but it is said to involve at least a dozen main characters, some of whom have incredible destructive powers at their fingertips. The directors did confirm in December that they will shoot all of Avengers: Infinity War Part I and Avengers: Infinity War - Part II with these new IMAX cameras. Hopefully we'll get more information about this pivotal scene as we get closer to the May release date.

Marvel's Captain America: Civil War finds Steve Rogers leading the newly formed team of Avengers in their continued efforts to safeguard humanity. But after another incident involving the Avengers results in collateral damage, political pressure mounts to install a system of accountability, headed by a governing body to oversee and direct the team. The new status quo fractures the Avengers, resulting in two camps-one led by Steve Rogers and his desire for the Avengers to remain free to defend humanity without government interference, and the other following Tony Stark's surprising decision to support government oversight and accountability. Get ready to pick a side and join the nonstop action playing out on two fronts when Marvel's Captain America: Civil War opens in U.S. theaters on May 6, 2016. Take a look at the runtime listing below, and stay tuned for more on Captain America: Civil War, hitting theaters in just under two short months.