Well they never really left but it's finally airing new episodes of Young Justice and Green Lantern:
Things to come. We had two new episodes this week.
Speedy hears the breaking news that he's missed out on eight years of his life. This causes him to lash out at Green Arrow for giving up on finding him. He then escapes from his hospital bed and goes after the man responsible for his plight. Lex Luthor. After failing to kill Luthor in a surprise attack at his office using a Rocket Launcher he battles it out with Mercy all the while trying to take Luthor's life. When he manages to corner Luthor, Luthor offers him something he's been missing from his life.
The other subplots include everyone mourning Artemis in their own ways including her Father and Chesire. Aqualad has a target painted on his head from all sides of the law. Also looks like everyone forgot about Superboy's Birthday.
Spoiler:- The New Guy:
Hal comes home to earth to find out he's been fired and replaced due to his absence all these months he spent trying to stop the red lantern invasion. Later that day he meets the new GL for earth who seems to have replaced him in his own sector as well. After butting head with him a few times they have to team up to stop some reactivated manhunters that were discovered by accident on Earth.
Pretty good episodes actually and from the looks of the trailers things are getting real for both shows.