Great news for any Thundercats fan. Warner Brothers is supposedly getting a Season 1, Volume 1 ready. Here's the article I got from TVShowsOnDVD.com:

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Thundercats - Thunder, Thunder, Thunder, Thundercats Ho! DVDs on the way!
Posted by David Lambert
2/23/2005

Feel the magic! Hear the roar! Join the powerful Thundercats as they battle the evil forces of Mumm-Ra and his servants of doom. Lion-O, the young but courageous leader, wards off evil attackers with the help of the mighty Sword of Omens, which holds the mystical Eye of ThunDera jewel...the source of the Thundercats' power! Lion-O, Panthro, Cheetara, Tygra, WilyKat, Wilykit, Snarf and the spirit of Jaga join Lord Lion-O at Cats' Lair, protecting Third Earth from Mumm-Ra and his mutants from Castle Plun-Darr!

This beloved Rankin-Bass animated series from 1985 is coming home to DVD very soon, according to Warner Home Video. A 3-disc set called Thundercats - Season 1, Volume 1 is expected to arrive in the May/June timeframe. An exact date has yet to be announced. Stay tuned, and we'll bring you details and cover art just as soon as we can!