The document discusses the Marvel comic book universe and the challenges of maintaining continuity across multiple stories and characters. It describes how Marvel addressed this by establishing the concept of a "multiverse" where different stories could exist independently. It then explores how this concept of a fictional universe or continuum has changed in a transmedia environment, with audiences now experiencing stories in a more personalized way through social media interactions and buzz. Maintaining consistency and continuity has become more complex, and information may have an expiry date in this new storytelling model.