In advance of Monday's screening of the previously released "Batman v Superman: Dawn of Justice" trailer at IMAX theaters nationwide, director Zack Snyder unveiled two new character posters --featuring the battling DC Comics superhero icons -- via Twitter on Sunday.

The IMAX event was originally intended to be the premiere of the trailer, before a pirated version leaked online late last week. Subsequently, Warner Bros. released the official version on Friday. Snyder has promised that fans who attend Monday's event will get "a few extra shots plus a little swag."

"Batman v Superman: Dawn of Justice," starring Ben Affleck in his first appearance as Batman and Henry Cavill returning to his "Man of Steel" role of Superman, plus Gal Gadot debuting as Wonder Woman, is scheduled for release on March 25, 2016.