In comparison to how Super Hero Taisen had Rider and Sentai team-up based on their Super Hero Time blocks, this time, the group teams are based on similar theming or other in-series references except X and Shin.
Saikou, Den-O, ToQ 1gou, Ex-Aid and Kiramai Red: More lighthearted comical designs and themes, with two of them being train heroes.
Gokai Red and Zi-O: Anniversary heroes that had a Continuity Cavalcade and tons of cameos.
Decade and Lupin Red: Decade is working with another gun-toting phantom thief, while Lupin Red is working with another Tsukasa in pink (magenta).
Kenzan, ZX, NinjaRed, HurricaneRed and AkaNinger: Ninjas.
Battle Japan, GoggleRed, ZO and Kiva: Heroes that have partner creatures and originate outside from Japan.
Espada, Stronger, DenziRed, Red1, and Build: Electricity and science heroes.
Sabela, Red Racer, Go-On Red and Drive: Car-themed heroes. The exhaust smoke is where Sabela fits in.
Slash, VulEagle, Blade, Shinken Red and Gaim: Swordfighters.
Super-1, Red Flash, FiveRed, Fourze and Shishi Red: Space-themed heroes.
Nigou, DynaRed, J and GoRed: Riders that used to be photographers, and Reds in a position of authority. Themes of protecting life.
Saber, ChangeDragon, Agito, Ryuki and Ryusoul Red: Dragon and knight-themed heroes (Ryusoulger was initially guessed to be a dragon-themed sentai).
ZenkaiJuran, TyrannoRanger, AbaRed, OOO and Kyoryu Red: Dinosaur-themed heroes (OOO's Purple Cores being dinosaur themed).
Buster, Red Mask, Black, RyuuRanger and GekiRed: Martial arts and a focus for super strength.
Skyrider, Red Falcon, Red Hawk and Zyuoh Eagle: Flying and bird-themed heroes.
ZenkaiVroon, Black RX, Red Turbo, Bouken Red and W: A theme of adventure and learning.
Durandal, MegaRed, TimeRed, Faiz and Kabuto: Time and speed heroes.
Blades, ZenkaiGaon, Amazon, GingaRed and GaoRed: Lion and animal-themed heroes.
Riderman, OhRed, DekaRed, Hibiki and Patren 1gou: Mentor-theme for Riders, and police-themed Reds.
ZenkaiMagine, MagiRed, Gosei Red, Wizard and Ghost: Magic and supernatural-themed heroes.
Zenkaiser, Twokaiser, Akarenger, Spade Ace and Red Buster: Zenkaiser working with the first two Sentai (one he was based on), and Twokaiser working with the one that came after the one he was based on.
Ichigo, V3, Kuuga, Zero-One and Saber: Saber working with the first Riders of each era. V3 and Saber are also both the protagonists of the series after the first of their era.
Why is most of Asmodeus’ army comprised of Jark Matter members? Besides the writer having previously headed that series, they were one of two villain organisations that achieved world domination and attained almost total victory (the other was Baranoia, but no costumes for them exist anymore).
The Akibaranger gear could only really make sense to be used in this movie. Much like Akibaranger, the plot of this movie hinges on Super Sentai (and Kamen Rider) being fictional stories.
