My brother had brought home an record once by Paul McCartney & Wings. The LP Venus & Mars featured a track called 'Magneto & Titanium Man'. I knew it was too big of a coincidence that the title was named after Marvel Comic Book villains.
It turns out Marvel Comics noticed as well, and were pretty excited. Paul McCartney went as far to invite Jack Kirby (who's daughter was a huge Beatles fan) to the US shows, and commissioned him to design some back drops that featured the band as superheroes.