I heard that after all these years working on the DC cartoon shows Bruce Timm finally got sick and tired of DC, or whoever, restricting which characters he could use and probably how he could use them.
For example he was not allowed to use Blue Beetle, he wanted him in the Booster Gold episode but instead had to use Elongated Man. He also wanted to use the Specter, but was not allowed. He drew him for me at the comic con last year.
He also wasn't allowed to use the JSA, but he says that was good because they were able to do more in that JSA like episode because they weren't the real JSA.
Plus I think with certain characters he had to do them in a certain way, like when he did the Aquaman episode I think he had to use the version where Aquaman had a hooke hand, long hair, and a beard.
So it was propbably character restrictions, and ratings too probably.
I could see being sick of all that garbage, different studios owning the rights to the characters that they may or may not one day make a movie out of. Personally I think if they had put Blue Beetle in the cartoon show the public would have wanted to see a Blue Beetle movie.
Also, don't know if this had been posted already. Maybe it has. But David Borianis (I know I spelled it wrong), the guy who played Angel on Buffy, he is going to be doing the voice for the Green Lantern in Darwyn Cook's JLA: New Frontier.
other than that I haven't heard anything.