wat a rip off.....all the previous kishi wasted saving four tails...and when naruto saves 4 tails ....kishi kicks sons ass again....could have been better if we were too see naruto fighting alongside son even for a little bit!!!
the "dap" or the "bump fist" scene with Naruto and Son signals the concurrence of two of the most powerful bijuus - the four and nine tails.
the gesture happened after son said he would "give" something to Naruto.
that something is "kurama's submission" to Naruto signalling their "team up".
this however will be characterized by "difficulties and adjustments" between the two (Naruto and kurama). tobi might take advantage of this "trial stage".
going back to son after his build up; his role was to "emphasize" a powerful "team up" between Naruto and kurama. the rise of the planet of the apes (the film) tells us that "canine or wolf stature" is submissive to apes. this power submission exemplifies a "kurama surrendering to his jinchuuriki" after being influenced by son.
and i guess, son was not saved, he was stopped. Naruto stopped his stint in the manga (hope it is not the last time we see son - - cause am an ape fan), so to give way to the others.
we will be witnessing great confrontations next.