I have an idea,
since they can all be seen in public now, gantz will no longer set them free so karuno will get the blue screen of death at the begining of next issue. if you think about it before if any one found out they would have to be killed or something, since every one saw what punishment has occured. karuno will probly not be able to leave. (i hope atleast, his time in gantz has made him a better person then who he was at the begining.)
but karuno cant leave, hes the main guy, if your guna kill him off fine, but not this crappy way.