Power Rangers would not have existed if not for Spider-Man.
In the late 1970s, Marvel had a cross-branding effort with Toei, and it was such that Toei could use Marvel characters and Marvel could use Toei characters however they wanted, for a limited period of time. As many of you know, this led to the making of a Japanese live-action Spider-Man show called Supaidāman. It featured giant robots and such, and it was a hit in Japan. After the terms of the license expired, Toei stopped making the show. But they needed a replacement for it. This is why they took inspiration from the show and made a whole new show called Super Sentai. It had giant robots in the style of Supaidāman. Super Sentai was the show that was adapted in the US as Power Rangers. And the rest is history.