I believe Naruto's End will be inspired a lot from the Japanese Mythology, or Budhism maybe? Since most of the important jutsus are inspired by the mythology ( Izanagi , Izanami .............) .Rinnegan itself is from budhism ! So why not ? Also i think it may be fair to have Naruto to make real his goals and dreams so that the message of the manga's main character and the manga's itself ''Never give up'' to be confirmed non? Other than that i hope its better than Mass Effect 3 ending ! hahahaha