In extremely pleasant news, Avatar: The Last Airbender, the greatest fantasy TV show of all time*, is getting a snazzy HD re-release for the 10th anniversary of its first run ending.
The show will arrive on Blu-Ray on 1 May in a box set containing all three seasons, as well as some new documentaries, commentaries and an "animated graphic novel" called Escape from the Spirit World. Sadly, a lengthy video featuring M. Night Shyamalan apologising for the Last Airbender live-action movie will not be included.
Avatar's spin-off sequel series, The Legend of Korra, is already available on the format, allowing completionists to assemble the combined seven seasons of the two shows for a complete HD run-through (and hey, remember to throw in the canonical graphic novels as well!)..
* Yes, including that one.