Naruto is the most leadendary person beside 6 paths, and his direct offspring. he is the only person in the ninja world that uses power close to the 6 paths, and i believe he will get the rinnegan. if naruto doesnt get the rinnegan then the whole naruto anime wont make sense. He has to get the rinnegan. Itachi couldnt have given naruto anything else. sasuke has the eternal sharingan, something itachi never had, therefore sasuke has supassed itachi, and I believe anything besides itachi giving naruto the rinnegan would be useless. Naruto is an uzamaki, and pain was too. Mandara said out his own mouth, he gave pain the rinnegan. just put the pieces together.