Originally posted by: wirm
I believe Kabuto was using his injured hand to stab, but I'm not sure.

Also, Kabuto was awfully sneaky in his confrontation with Kakashi earlier (activating dead bodies and such). I find it hard to believe that he's going to go head-on against a move he doesn't understand.

Anyway, I get the feeling that's not enough to stop him. Rasengan doesn't seem like a kill move anyway.
I have to say that it is. Kabuto was WAY above Naruto's level, and it still took him down. Sasuke's Chidori didn't kill Gaara, but we know that it's a 'kill move'.