UPDATE 7/5/106 3:20 PM PT: The poster featured in this article is unofficial art. The following story has been amended.

A new poster has surfaced from Warner Bros. Animation's upcoming "Justice League Action" animated series, showing off slightly different -- and noticeably more mature -- versions of DC's Trinity.

Compared to the previously-released, more younger-skewing art, the latest piece seems geared towards a slightly older demographic -- however, the source of the art hasn't been identified, so at this point, it's unofficial.

Check out the "Justice League Action" poster below:

Batman, Superman and Wonder Woman lead the DC Comics Super Heroes against their most infamous foes in adventures packed with relentless thrills, fun and action. No need to wait for the good stuff to start, each eleven-minute episode jumps in with lightning-paced action and heroics. Whether defending the Earth, facing invaders from space, or battling the bizarre forces of magic, the always-rotating team of Justice League heroes, are up to any challenge.

The series, which will be released in 11-minute installments, sees the return of Kevin Conroy and Mark Hamill as the voices of Batman and the Joker, respectively, along with James Woods as Lex Luthor and Diedrich Bader as Booster Gold. The tone of "Justice League Action" is being compared to the super-successful "Teen Titans GO!" animated series.

Executive produced by Warner Bros. Animation president Sam Register, and produced by DC animation vets Butch Lukic, Alan Burnett and Jim Krieg, "Justice League Action" is expected to debut to the public this fall on Cartoon Network.

(via ComicBookMovie)