Board Thread:Naruto Discussions/@comment-30323490-20180418150329/@comment-30323490-20180418190155

That's the thing. I doubt that distance has anything to do with summoning. I may be wrong, but i can only recall the fact that for larger summons you have to put in more chakra. I don't remember ever being mentioned that distance influences the amount of chakra you need to put in. Again, the summon doesn't travel any distance in the transportation process.

And Hagormo had to summon not only team 7, but 9 Bijuu + Madara as well.Team 7 were meaningless compared with the Bijuu. Hagoromo was also a spirit, and not even close to his full power. Hence why he needed the other Kage spirits to aid him in the process.