@the specialist, I like your prediction about naruto using his clones, in other to warp through vast distances.
Yeah I hope something like that happens in the near future at least. Naruto is going up against speed demons, so perhaps he can make great use of the shadow clones to traverse great distances using some sort of self summoning method via the shadow clones' memory absorption, to arrive at the location immediately. Have not quite came up for a way for that to be possible but I'll think on it. Minato's Kunai could be more like a keepsake.