They Hv ALL been revealed, with the exception of, perhaps, 3
Check it:
Axel
Xaldin
Xigbal
Luxord
Demyx
Marluxia
Larxene
Lexaeus
Zexion
Vexen
BHK
Mickey
Riku
The last three are NOT SPECIFIED ad Order members, but hv been seen in cloaks- any other suggestions?