The folks at UltimateDisney.com mentioned that Disney's 26th animated feature, The Great Mouse Detective, is getting a new edition next spring.
This is in addition to new releases of:
The Black Cauldron
Fantasia/Fantasia 2000 (Spring Platinum/Diamond Edition release ??)
Still unknown if Dumbo displaced Fantasia/Fantasia 2000 as the spring Platinuim/Diamond edition release.