A recent photo shared online by Reddit user UnknownJ25 appears to indicate that Cartoon Network are working on a new DC Comics related project.
The picture, seemingly taken in one of Warner Bros.’ Burbank offices, shows multiple already airing Cartoon Network shows, along with a poster for a mysterious show named JLA. The poster stars the silhouettes of many popular Justice League heroes, such as Superman, Batman, Wonder Woman, Firestorm, Hawkgirl, Shazam, and a few others.
There have been a few rumours flying around about this show, such as it will be named Justice League: Action and premiere on Boomerang instead of Cartoon Network, however anything is net not be officially confirmed.
It seems highly unlikely that the poster is for the classic Bruce Timm/Paul Dini Justice League Unlimited series, since all the other posters are for ongoing shows, but until an official announcement is made, this is all just speculation.