The term reboot, in media dealing with serial fiction, means to discard much or even all previous continuity in the series and start a new with fresh ideas.[1] Effectively, all established fictive history is declared by the writer(s) to be null and void, or at least irrelevant to the new storyline, and the series starts over as if brand-new
http://en.wikipedia.org/wiki/Reboot_(fiction)#Reboots_in_films_.26_television