What happened 4 June 2013 AD in United States of America

On June 4, 2013, DC unveiled two new digital comic innovations to enhance interactivity: DC2 and DC2 Multiverse. DC2 layers dynamic artwork onto digital comic panels, adding a new level of dimension to digital storytelling, while DC2 Multiverse allows readers to determine a specific story outcome by selecting individual characters, storylines and plot developments while reading the comic, meaning one digital comic has multiple outcomes. DC2 will first appear in the upcoming digital-first title, Batman '66, based on the 1960s television series and DC2 Multiverse will first appear in Batman: Arkham Origins, a digital-first title based on the video game of the same name.