A "Partners" idea would be nice, for Chip N Dale if they have enough to fill their own collection. However, Daisy and Minnie shorts would likely end up on the Mickey or Donald collections, wouldn't they?
Definitely another volume of Silly Symphonies needs to be released, and of course more Donald (love mah donald!)
I think a release of Song of the South as apart of the treasures collection would be the best way to combat any of their worries about boycotts and such. That way we'll have the whole 'perspective' thing given to us, and its released more quietly, since the treasures are not that publicly known, except to big fans.
I agree that another volume of Silly Symphonies is definite to come. I also think that Chip and Dale would make a great treasure and we'd get to see a great restoration (in contrast to the Classic Cartoons volume).
On the subject of Song of the South being released as part of a treasure, the question arises: how would they fit it in with anything else?
Also, I think that when they do decide to release SotS, they will promote it as being "first time available on DVD" in order to increase sales (Disney never turns down an opportunity to make $ and I think they'll capitalize on this one). Despite the fact that it isn't really a great movie, many will buy it simply because it hasn't ever been released in the US and it is advertised that way. They'll want to know what the fuss is all about (I know many of us on UD will purchase it for that reason alone).
I don't see boycotts arising from it's release- it's been hyped way more than it should have been. After watching it, I really did wonder if people were being overly sensitive. And again, it would be hard to stick it in with the Treasures since it doesn't fit into a certain category.