R.I.P. to one of the greatest human beings this Earth has ever had to offer! I'll miss ya Robin Williams!
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So first I want to say that I want to say that I think that each character will only get one costume disc for themselves. NOW, this means that Donald would only have one costume disc that has his likeness on it (All for One) but that's not to say that discs won't work on multiple characters. The only character I think that might be the exception is Mickey, solely for his classic red shorts look (which I think he'll get in 2.0) and eventually (maybe not in 2.0 exactly but eventually) I think he'll get a b&w Steamboat Willie costume disc that would work on all currently released ToonTown figures, so Mickey might get two, but everyone else I think might only get one, that might be able to share when it makes sense.
Definitely Experiment 626 for Stitch:
For the rest...
1.0Mickey: Three Musketeers (All for One disc), Classic Mickey, KH Mickey (I'm thinking a Sora figure with a KH3 look, but a costume disc that uses his KH1 look, but this disc would unlock the KH costume for Mickey, Donald & Goofy) & Retro Mickey.
Jack Skellington: Santa Jack
Buzz Lightyear: Glow in the Dark Buzz
Wreck-It Ralph: Hero's Duty uniform
Vanellope: Princess gown
Anna: Coronation Gown (same disc as Elsa)
Elsa: Coronation Gown (same disc as Anna)
Mr. Incredible: Classic costume (same disc as Elastigirl)
Elastigirl: Classic costume (same disc as Mr. Incredible)
Rapunzel: Short brown hair look
Lightning McQueen: Radiator Springs paint job
Mater: Rust free Mater (where he's a teal color and still has his hood)
2.0Donald: KH Donald (see KH Mickey) & Retro Donald (same disc as Mickey).
Maleficent: Animated costume
Merida: Formal Merida dress
Jasmine: Marketplace Jasmine
Baymax: Medbot Baymax (no armor)
Thor: Golden Age Thor costume
Hawkeye: Masked Hawkeye costume
Nova: Golden Helmet Nova
Star-Lord: Comic book Star-Lord costume
Rocket: Comic book uniform costume
Groot: Guardians uniform costume
UnannouncedGoofy (only non-confirmed figure I'll have on here): Three Musketeers (All for One disc), KH Goofy (see KH Mickey) & Retro Goofy (same disc as Mickey).