I came across a piece citing a potential explanation for Cartoon Network's current removal of the DC Nation block:
LINKTV: Did the Milestone characters kill DC Nation?
DC Nation was suddenly pulled from Cartoon Network’s schedule last week with a date sometime early next year announced for its return. The highly popular block featured Young Justice, Green Lantern: The Animated Series and a series of minute long shorts starring various DC characters from every spectrum.
The sudden disappearance upset a few and trumped many other announcements during New York Comic Con weekend.
Now word is coming out that negotiations between DC and Milestone Media may be the reason for the block’s sudden disappearance. Static, Icon and Rocket have started to appear in episodes of Young Justice, but with rights issues murky at best, they may delay production of the series until those issues are ironed out.
Even up until earlier this year, the characters of Milestone regularly made appearances as part of Static Shock, a launch New 52 title. But with poor reviews and a cancellation after issue eight, the Milestone heroes were left without a place in the New 52 DC universe. Since that time, many fans questioned whether DC would continue to use the characters.
If this is truly the reason for DC Nation’s sudden departure, fans can only hope for a quick negotiation between DC and the Milestone Media conglomerate.
Even Bleeding Cool has cited this as one of the potential reasons:
http://www.bleedingcool.com/2012/10/...just-vanished/1. Young Justice is the biggest problem
Young Justice characters like Static and Rocket were created as part of Milestone, the DC imprint designed to reset the balance of ethnic representation in comic books. I’m no expert on the ins and outs of it, but we’re hearing there’s a rights issue here, with extra royalties due for the use of these characters – and particularly in respect of them appearing on merchandise.
Given the timing of recent events, this sadly seems more likely, especially as the abrupt postponement was done right before this particular episode.
The reason this may have affected the entire block is because this series is the anchor of the whole of DC Nation. It draws in viewers to the entire block, boosting both GL and segments such as the shorts. The block airing without Young Justice could mean a huge drop in ratings for Green Lantern and DC Nation as a whole.
Hopefully, this all gets resolved soon.