And it's not just comics that employ sliding-timescales. I remember back in 1981 when John Gardner started writing James Bond novels. He just picked Bond up from where Ian Flemming left him in the early 60s, dusted him off, and dropped him in the 80s as if little or no time had passed. Gardener and then another author continued writing Bond novels set at the time of release for over 20 years, with the character changing little and aging less.