The supposed story is after Arthur's death, Ichigo, and Rukia was to search for the Albionian Orb of King Arthur in the Mortal World. Arthur said that his soul will be in it, along with other deceased Kings of Camelot. Ichigo and Rukia, along with Uryū Ishida, Chad, and Orihime Inoue and Renji and with the help of Chronos, would be able to look for it.