Actor Allusion: The final episode features cameos by Kazuo Niibori and Naoki Ofuji, the suit actors for Red Hawk and Black Condor, as the priest who conducts Ryu's wedding with Kaori and the mugger who stabs Gai respectively.
Periphery Demographic: J-drama magazines of the time had coverage of Jetman, something not seen before or since from a Sentai.
What Could Have Been: A Super Sentai art book showed that they were gonna have a giant, heavily armed fortress robot, like in Turboranger and Fiveman, but didn't go through with it (from the sketches, it would've been a retooled version of the Turborangers' Turbobuilder).
Like Sun Vulcan, Bioman and Turboranger, this series was originally going to be the first Power Rangers series. However, Saban passed on this series in favor of the next one.
Due to how much Fiveman flopped (as noted on the trivia page for that series), Toei originally had intended for this to be the last Sentai series. Fortunately, this series ended up saving the franchise.