props for creativity, I'll give you that..
Yeaahhh, but he is kinda dead.
The whole time travel seems more along Yondaime's ability.
By Naruto nature only way that he would come up with a time travel jutsu, would if something very bad happened, and not even a reincarnation jutsu would work..
I don't just see him going back, and even trying to kill himself (that would certainly create a plot hole) to stop some future biju war/disaster
If were to think someone from the future came, I wound't say naruto. But his SON.
Still the utopia thing, if the bijus are bad, destroy them.. not store in a jar!
Its just, if naruto came back from the future to prevent the future generations to use bijus, he alone could take care of all others, including himself.
"Chile is a thin and tall country"