To learn about the process of animating these characters, as well as hearing a glimpse of Kevin Conroy's voice as Batman, check out GameInformer's video with the link below.
http://www.gameinformer.com/b/features/archive/2014/03/10/batman-39-s-new-moves-the-animation-of-arkham-knight.aspx
Summary
-After defeating a henchman in combat, Batman no longer simply stands up straight. Instead, he will pause in an "interesting pose."
-Batman has a new fighting ability called "Weapon Steal," which allows him pick up weapons off the floor and use them against his enemies.
-Batman can use the surrounding environment against his enemies, such as taking things off the wall and smashing them on his opponent.
-The transitions between cutscenes and gameplay will flow much more smoothly.
-Arkham Knight uses motion-capture for cutscenes, including the face, body, and sometimes, the voice.
-If the voice actor can not preform due to traveling issues, their voice is dubbed over the motion-capture actor's voice.
In the explosive finale to the Arkham series, Batman faces the ultimate threat against the city he is sworn to protect. The Scarecrow returns to unite an impressive roster of super villains, including Penguin, Two-Face and Harley Quinn, to destroy The Dark Knight forever.
Batman: Arkham Knight introduces Rocksteady’s uniquely designed version of the Batmobile, which is drivable for the first time in the franchise. The addition of this legendary vehicle, combined with the acclaimed gameplay of the Batman Arkham series, offers gamers the ultimate and complete Batman experience as they tear through the streets and soar across the skyline of the entirety of Gotham City.
BATMAN: ARKHAM KNIGHT software © 2014 Warner Bros. Entertainment Inc. Developed by Rocksteady Studios. BATMAN and all characters, their distinctive likenesses, and related elements are trademarks of DC Comics © 2014. All Rights Reserved. (s14) "PS4" and the "PS" Family logo are registered trademarks and the PlayStation Network logo is a trademark of Sony Computer Entertainment Inc. Kinect, Xbox, Xbox One, Xbox LIVE, and the Xbox logo are trademarks of the Microsoft group of companies and are used under license from Microsoft. All other trademarks and copyrights are the property of their respective owners. All rights reserved.