I hate how people keep saying plot no jutsu and saying Kishi trolled them, it's like saying Harry Potter is BS cause he survived and J.KRowling doesn't know what she's doing... WTF! They are the writers! They invented the worlds we find entertainment in, to act like a spoiled brat because shit doesn't go your way is tantamount to narcissism!
On another note Obito has shown he is nothing more than an overly emotional kid who has no sense of logic or rationale and is just reacted blindly off his feelings which is why Madara has been able to use him as a pawn, it's pathetic really, dude needs counseling big time.
I predict Kakashi is going to die and somehow Tsunade is going to sacrifice herself to save Gaara in order for him to help Naruto, both of these tragic losses will trigger something in Naruto giving him powers similar to those of the So6Ps, if this happens i'll be 5/7 predictions so my fingers are crossed.
Madara's two weaknesses are his arrogance and his lies; remember the best way to defeat someone of his caliber is to let them think they've already won, which Madara clearly believes; in the case of his second weakness it's quite obvious really, a liar that good always convinces themselves that their lies are the truth, that's the best way to deceive someone, to first deceive oneself, if you yourself begin to believe the lie it's easier to spread it. The lie in this case is that he "awakened" the Rinnegan. I look at it this way, have we seen a Byakugan user "awaken" the Sharingan or vise versa? Why should it be any different with the Rinnegan? Logic people, logic.
