Board Thread:Theories and Speculation/@comment-26490760-20150926205437/@comment-734582-20150927113640

Dobbe81 wrote: I have my own thoughts but I want to hear everyone else's thoughts on the matter. According to the new Boruto movie (AKA Word From God), there are actually many other worlds with humans on it, and many other Shinju trees. However, apparently we're the only one that actually got chakra. Though this is information we probably could've guessed based upon the fact that the Otsutsuki already came from another planet and that the Shinju's creation is known to be from the blood of the deceased, so as long as there are beings that fight, Shinju can be made.

So technically it's not impossible. However, i believe that because we destroyed our Shinju, travel to other worlds isn't possible except via Sasuke (since, Kaguya's "dimensions" are actually planets -just look at the picture of Kaguya being sealed the second time). After all, the Rinne Sharingan is originally the blooming of the Shinju and is probably how the Otsutsuki travelled between the stars, said travel being a known power of the Rinne Sharingan.