Prop Recycling: All the costumes in the play are recycled from Gaim proper.
The Proto Armored Riders use the original suits but with the undersuit parts repainted black and silvernote Proto Baron is actually just Black Baron from Gaim Gaiden: Baron with silver belt straps and the accents on his thigh armor painted out.
Zangetsu Kachidoki Arms is a repaint of Gaim's version with a new chestplate and helmet, green Kachidoki Bata flags, and a DJ Gun painted green and white instead of orange and blue.
The Masahito Overlord costume is Redyue repainted white and gray with shoulder spikes added on. It even uses her signature Dau halberd, albeit with the two "Lockfruit" removed.
What Could Have Been: According to Issue 260 of the Figure King Hobby Magazine, Toei Company and nitro+ were originally considering a stage play based on Kamen Rider Ryuki, but those plans fell through and ended up becoming a Gaim stage play.
Other trivia
This stageshow is currently the only one in the Kamen Rider franchise to not directly offer the Transformation Trinket exclusive to the production as a toy. Instead, viewers were given a DX Zangetsu Kachidoki Ridewatch, compensating by being the only Ridewatch out of the hundreds released to feature lines from the Rider it is based on (not including Memorial bundles.) The Shin Kachidoki Lockseed would eventually be released as part of Zangetsu's add-on pack for the CSM Sengoku Driver.
