I must assume Marvel still holds some form of copyright/trademark control over the Japanese Spider-Man series from the seventies (tho I'm sure there was still some negotiation required to use him in Spider-Verse) but by any chance does the company still own a piece of the original "Super Sentai" series, Battle Fever J, which Marvel co-created? I just think it'd be hilarious for them to show up in a comic on some parallel Earth.