Alternate Costumes is a must have please!! at least for major characters. Strawhats are already confirmed in saboady costume, with luffy in marineford clothes
Luffy - Base, Marineford, Afro
Zoro - Base, Saboady, Yellow Jacket CP9 (Hopefully arlong park or skypiea)
Nami - Base (original east blue), Saboady, CP9 skirt and jacket
Usopp - Base, Saboady, Sogeking!!, (maybe thriller bark or bandaged usopp from luffy fight)
Sanji - Base, Saboady, (hopefully Skypiea, arlong park, and Chef Outfit!!)
Chopper - Base, Chopperman, CP9 jacket
Robin - Base, Saboady, Miss All Sunday, Water Seven
Franky - Base, Saboady, Mask and blue cloak
Brook - Base, (Maybe human form???? or kill bill from filler!)
Buggy - Base, Impel Down, Marineford
Crocodile - Base, Impel Down/Marineford
Smoker - Base, no jacket!
Lucci - Base, Cloak and mask
Mr. 2 - Base, Impel Down
Vivi - Base, Mrs Wednesday
Hancock - base, Marineford
Duval (if in) - Masked, Unmasked, Face lift hahaha