Families of artists Steve Ditko and Jack Kirby, and broadcaster Jonathan Ross, say pair were at forefront of creating Marvel characters
When movie fans stream into cinemas this weekend to watch the latest big screen outing of Spider-Man in the animated Across the Spider-Verse, they will be adding to box office takings that have already hit $500m.
It is the most recent instalment for the multibillion-dollar juggernaut as the superheroes created more than six decades ago by Marvel Comics continue to take the world by storm.
