it would be intresting if he can. It would make a nice surprise attack.

as for kabuto being the spy, its not likely. at the begining of the chapter it says something like "the man who lives his life just out of orochimaru's sight".

Still i'd prefer it if it were kabuto. I dont see the team catching some random spy and torturing the info outta him. Its more likely that it'll be kabuto, he'll end up escaping, but he'll tell him something rite before he leaves.