Gamers who pre-order "Batman: Arkham Knight" will get to play as Harley Quinn in exclusive new content.

Rocksteady's newest Batman title announced the "Harley Quinn Story Pack" on Twitter. Players will be able to use Quinn's "unique weapons, gadgets and abilities" in the DLC.

The gaming studio announced earlier in June the final installment of their "Batman: Arkham" franchise will be delayed until 2015. Lead Animator Zafer Coban told EuroGamer the studio is working on the game's level design during the delay.

"It's going to be the level of detail, really," Coban said, referring to what the gaming studio will work on during the delay. "We're so concerned about bringing out the final installment and making sure it fits the bill in terms of the quality range we've been delivering with the last two games. Our attention to detail is pinnacle. So we've had to do that for our last installment and make sure it works across the whole board."

The gaming studio hasn't confirmed a new released date, but Batman voice actor Kevin Conroy may have let in slip during an interview Groovey.TV. The site spoke with the voice actor during Denver Comic Con.

"I have a massive game you may have heard of called Arkham Knight," Conroy said. "It was supposed to come out [this] January, we've been working on it for a year and a half, it's still not done. So it's going to come out next January, but I know everyone is frustrated...The reason it's been delayed is because it's so awesome."

However, a listing on Microsoft Store's website recently claimed the title will be released on Feb. 24, 2015. The date has since been removed by the website. You can pre-order "Batman: Arkham Knight" here.