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http://tvshowsondvd.com/news/Freakazoid-Rumors/8383
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"There currently are no plans for the final, volume 4 DVD release of Animaniacs. However, Tiny Toon Adventures has been green-lighted for release, in the same numerical-order format."
http://tvshowsondvd.com/news/Tiny-Toon-Adventures-Rumors/8384
I wonder if Warners is considering future sets of Taz-Mania, Sylvester and Tweety Mysteries, Histeria! and Pinky Elmyra and the Brain?