The question is, will it be released as a Masterpiece Edition? My only clue for criteria for this collection is that it is reserved for psuedo-popular classics that have the potential to sell a couple of million copies. Alice in Wonderland was, and still is, a notorious Disney flop, but it still had a massive cult following to ensure a release. Pocahontas was not a total failure, just a financial letdown. HOwever, they can't ignore it's 2 Academy Awards (which is why I usually include it in the Fab 4, so to me it's the Fab 5 and I'm not going to start on how upset I was when I found out two years ago then it wouldn't be in the Platinum line), plus, many historians view it as a great artistic achievement on Disney's part. The explanation for Lilo & Stitch is a little more tricky. It's safe to say that the post-Tarzan movies that don't already have 2-Disc sets will probably never have them again. Those that do, will probably have those as their definative versions. However, Lilo & Stitch was one of the first, and still is, true successes of the animated cannon, which could merit a re-release as some time of 2-Disc Edition.
Sleeping Beauty and Mulan are both well-known Disney films that have mass Disney appeal. For that, they are designated as Special Editions, to indicate that they are higher that the Masterpiece Editions. I bet no one noticed this, but put your Beauty and the Beast, The Lion King, Sleeping Beauty, and future Mulan next to each other, and what do they all say? Special Edition! Unless you look on the cover, they all look like the belong to the same collection! No one would know what 10 belong to the Platinum line!
Now with that explanation said (

), I think this is a probably list of Masterpiece and Special Editions. I'm beginning to think that the Special Editions will be used to cross-promote the Platinum releases with each other.
Masterpiece Edtions
Hercules - 2006
The Hunchback of Notra Dame - 2006
They're going to have to release the 90's Broadway musical-esque films as 2-Discers sooner or later, so I think this is the right time for both.
Oliver & Company - 2007
I don't know, I'm just drawing at straws here. I'm think they may want to bump the single edition into a 2-Disk. ???
Special Editions
Dumbo - March 2006
Many people always think of Bambi and Dumbo as interchangeable and anyone can see why. THis would be a nice double dip for families with small children. Plus, there's been a rumor about this for some time, and we didn't know about Mulan until fairly late in the game, so.
Peter Pan, Pinocchio, Fantasia - October 2006, March 2007, October 2007
One word: classics. Three words: must 2-Discers. They're inevitable, and I would really like it if Fantasia had an independent multi-disk set.
OK, once these are realeased, honestly and truly, I don't think any more classics will be put into the three "established collections" - Platinum, Masterpiece, and the updated Special Edtions.
There are a few candidates, namely Tarzan and The Many Adventure of Winnie the Pooh. I see both in the Special Edition category, but when released, I don't know.
I'm confident this list is a close-to-accurate guesstimate. Of course, the underdogs might sneek in, but I have no idea.