>>149162065
Ditko has claimed that Jack Kirby may have created Spider-Man with Captain Marvel creator C.C. Beck and Joe Simon. In that same interview I posted, Kirby says he was involved in creating the character, but doesn't want to step on the toes of other artists. There's also famously a Spider-Man Halloween costume that was designed by Marvel in the 50's prior to the comic character existing and may have been designed by Kirby.