User blog comment:Machineman2005/Why is Battle Fever J among the Marvel Multiverse?/@comment-35997935-20200121021530/@comment-44176353-20200121135938

Short answer: Yes, and adding to because of financing. Old pics showed the copyright of M.C.G.(= Marvel Comics Group).

They made a mutual agreement: each will be able to use another's license. So, Toei could make "Spider-man" TV show. And, the character's copyright of Battle Fever J, Denjiman, Sun Vulcan could use by Marvel. And, in financial term, Marvel should pay co-finance for Sun Vulcan, because the show using Safari and needing more money.

At last of the agreement, Stan Lee "loved" Sun Vulcan Show, then ordered Marvel Productions (headed Margaret Loesch) to sell the show to U.S.. She tried, bat failed because "too Orient". In 1985, Stan Lee backed the rights to Toei. And, Margaret Loesch and Saban launched the "Power Rangers" in 1992.

Sorry for long story.