2007 marked the debut of the Silly Symphony Series with the release of the Ugly Duckling and his Mother ("A Loving Embrace") in February.
The second release is scheduled for May, 2007 with the release of The Old Mill ("Pastoral Sunset") followed by the Opening Title (pictured at left) in June.
This new series, one I personally am looking forward too, is not the WDCC's first time where a Silly Symphony short was the subject of a WDCC release. In 1993, entering it's sophomore year, the WDCC released The Three Little Pigs which consisted of the Open Edition releases of Fiddler Pig, Fifer Pig, Practical Pig and an Opening Title plus a Numbered Limited Edition release of the Big Bad Wolf all sculpted by Kent Melton (except for the Opening Title).
In 1995, the Walt Disney Classics Collection launched the Enchanted Places (background settings and miniatures) and included each of the Pig's homes (sculpted by Terry Izumi) and miniatures of Fiddler, Fifer and Practical Pig (sculpted by Robert Olszewski) plus an Open Edition release of the Big Bad Wolf in 1996.
During the Disneyana Convention of 1998, the Open Edition releases of Fifer, Fiddler, Practical Pig, the Big Bad Wolf, Opening Title and Enchanted Places releases were all honored with retirement.
In 1997, the Walt Disney Classics Collection introduced the first Gold Circle Exclusive, from the 1934 Silly Symphony short, "The Wise Little Hen" marking Donald's Debut! "Donald's Debut" was Limited to Production Year 1997.
In 2000, the Walt Disney Classics Collection introduced the Duos Series and once again a Silly Symphony short was the first release, this time Max Hare & Toby Tortoise from "The Tortoise and the Hare" (1934). Max ("The Blue Streak") and Toby ("Slow But Sure") were a boxed set Limited to Production Year 2000 and sculpted by Patrick Romandy-Simmons.
Each short is listed separately within the Secondary Guide but also compiled together under Silly Syphony Series for easy tracking.
Rumor has it that a future release could be Little Hiawatha. Nothing has been confirmed at this time. I personally would like to see Wyken, Blyken and Nod (a single sculpt would probably be the most effective) and Elmer Elephant & Tilly Tiger from "Elmer Elephant" (preferably a boxed set).
A complete listing of the Silly Symphony shorts can be found at The Big Cartoon Database.