Also, the fact that there is only one Town, it suggests that the intruders are the competing mafia faction.
Scum Team 1 = Aizen, Gin, Tousen, (+ Kira, Hisagi)
Scum Team 2 = Ichigo, Ishida, Orihime, Chad (+ Yoruichi)
If Urahara is the cult leader, Kon could be innocent child. Not sure what role Tatsuki would be. There could be a mechanics for either Scum team to recruit members.