Season 3 and Season 4 coming to dvd together December 6th
WBshop just put up the pre-order today. While Season 1 and 2 have separate releases, these two seasons are being released together in one package.
Date is December 6th, they don't have package design up but you can pre-order it now.
Communities left for being too closeminded: Gamefaqs, Home Theater Forum, Toonzone