Ah, the secret origins of a classic Super Sentai. Himitsu Sentai GoRanger started what would become Super Sentai in the 70s, but it officially got that title with Battle Fever J. Toei had already worked with Marvel to produce the live-action Spider-Man series that introduced the concept of fighting a monster both on the ground and then in a giant robot.
Yes, Spider-Man is the reason we have Megazords.
Battle Fever J, the second time Toei had worked with Marvel, features Battle Japan, Battle France, Battle Cossack, Battle Kenya, and Miss America (not the actual Miss America, but a heroine named Miss America) working together to fight the traditional forces of evil.
If things had progressed as planned, it would have been Captain Japan, a Marvel-sanctioned spinoff/remake.
Marvel never really mentions the fact that they had a hand in creating Power Rangers.
We all know the schedule. Toei makes a Super Sentai. The following year, Disney (or back in the day, Saban) adapts it into a Power Rangers. After that?
Once in a while, Toei dubs Power Rangers into Japanese.