Ever since the new trailer for Batman v Superman: Dawn of Justice debuted during Warner Bros.' Hall H panel at Comic-Con earlier this month, the superhero adventure has been riding a wave of positive buzz. There is still plenty we don't know about the story thus far, including a few actors whose characters have yet to be confirmed. Two separate reports surfaced today from Latino-Review and Heroic Hollywood that have reportedly revealed the characters played by Jena Malone and Callan Mulvey. While these details have yet to be confirmed, there may be potential spoilers below, so read on at your own risk.

Way back in October, Jena Malone was confirmed for a mystery role in Batman v Superman, after being spotted on the set alongside director Zack Snyder. Since then, she was rumored to be playing Carrie Kelley and Kahina the Seer, but those roles were never confirmed. Today's unconfirmed report reveals that she is portraying Barbara Gordon, who eventually turns into Batgirl and The Oracle in the DC Comics. Even if this report is true, it isn't known how Barbara Gordon will fit into the story. In the comics, Barbara was James Gordon's daughter. There is also a rumor that James passed away at some point before the events of Batman v Superman: Dawn of Justice.

Callan Mulvey, according to this second report, is playing Anatoli Knyazev, also known as KGBeast. The comic book character has been rumored to be a part of this story for quite some time, with Knyazev reportedly tasked with keeping track of all the "metahumans" for Lex Luthor (Jesse Eisenberg). The earlier report from November also revealed that NKVDemon will be a part of this story, but the involvement of both these characters was never confirmed.

Related: Snyder Calls Affleck the Perfect Batman, Shares New Photos

There has been speculation that Batman v Superman: Dawn of Justice will feature a flashback scene, where The Joker kills Batman's sidekick Robin. The new trailer features a scene where Bruce Wayne (Ben Affleck) gazes up at Robin's old suit, which has the hand-painted phrase "Ha Ha Ha Joke's On You Batman," teasing that The Joker is the one who ended Robin's life. It's possible that Jena Malone's Barbara Gordon could be featured in this scene where Joker kills Robin, but we don't know for sure.

What do you think of Jena Malone and Callan Mulvey's rumored roles in Batman v Superman: Dawn of Justice? Hopefully we'll get confirmation, one way or another, on who these actors are playing, along with Scoot McNairy's character who still hasn't been revealed yet. Chime in with your own theories about who you think Jena Malone and Callan Mulvey are playing in Batman v Superman: Dawn of Justice.