Task: Question Generation
Input (English): In 2011, Bandai posted a countdown on a teaser site. Once the countdown was finished, it revealed a reboot of the Digimon World series titled Digimon World Re:Digitize. An enhanced version of the game released on Nintendo 3DS as Digimon World Re:Digitize Decode in 2013. Another role-playing game by the name Digimon Story: Cyber Sleuth is set for release in 2015 for PlayStation Vita. It is part of the Digimon Story sub-series, originally on Nintendo DS and has also been released with English subtitles in North America.
Output (English): In what year did Bandai post information about a reboot on his website?