Naruto Shippuden 415 see’s Obito’s come back as Black Zetsu tries to escape with Madara’s help, in fact Obito uses his past and emotions to fight through and finally become himself. Madara sweet talks Obito into reminding him why he’s doing all this, however Obito sticks his arm into Madara and tries to absorb some Tailed Beast powers to keep Naruto alive.