At the San Diego Comic Con 2008, during the Hasbro panel discussion, a new animated feature G.I. Joe: Resolute was announced.
Now it's 9 months later and the series is set to air this month.
"G.I. Joe: Resolute is an animated series based on the G.I. Joe franchise, written by Warren Ellis and directed by Sam Register. The series will be released online as ten 5-minute episodes and one 10-minute final episode. These episodes will then form an hour-long movie. The movie is scheduled for broadcast on Adult Swim on April 25, 2009".
With the live-action movie coming out in a a few months this short series should have a nice little following...
Here's the SDCC footage of the trailer:
Read more about it on Ellis' blog HERE too.