A few comments, We dont know if obito gave kakashi his left eye or his right. It is just assumed he gave kakashi his left eye. Also kakashi being the leader is really stupid. Kakashi wouldnt backstab konoha. Also kakashi played out the fight with itachi? I think not, kakashi wouldnt act it out to the verge of death. Also I dont agree or disagree with the obito theory. I think obito might be it because he might of found out the uchiha secret. But other than that i dont know why he would turn evil. Im kinda leaning on obito not being the leader or apart of it