rinne tensei was implied by konan to be the ultimate move of any rinnegan user. obito has already wanted to use human path but opted out. i think he didnt use the other paths because he was conserving chakra for becoming juubi jin.
he didnt think kakashi would run him through after all. and its not confirmed hes dead or dying. nagato only died because he was that close to death already. but obi is probably regenerating his injury via black zetsu.
and besides alive madara may use edo tensei on obi and bring him back.
he didnt think kakashi would run him through after all. and its not confirmed hes dead or dying. nagato only died because he was that close to death already. but obi is probably regenerating his injury via black zetsu.
and besides alive madara may use edo tensei on obi and bring him back.