If Itachi felt where the source was coming from, why cant Madara? i think he'll drop a meteorite on Kabuto so Kabuto cant control him later, so he'd be free and the final villain
Well, I think Madara would rather be brought back via Rinne Tensei. So killing Kabuto would end all hopes of that because he would be stuck as an Edo until someone sealed him away - and if he gets sealed away, there is no way for him to be released..........
1. I dont think madara is under Kabutos full control.. I think he can break the link whenever he wants.
2. Kabuto is intelligent enough to ward off such threats.
3. There is no need to kill kabuto
that's a pretty weird idea, but theoretically madara can pull it off. after all, kabuto is giving im free rein, which means that in theory he can attack the caster, provided kabuto can't erase his personality in time.