From Cartoon Network's press conference:
It was the key announcement for the network, which...finally confirmed the rumored series Batman: The Brave and the Bold, which teams the Caped Crusader with a variety of DC Comics superheroes.
....the new Batman series, whose guest stars include Green Arrow, Blue Beetle, Green Lantern and Aquaman. No clip was shown, but Rob Sorcher, Cartoon Net's chief content officer, says The Brave and the Bold will be "equal doses of comedy and high stakes."
If you go here there is a bit more info as well as bigger pictures.