I never said this about a fictional character before but I so would have preferred it if Sasuke ended up fading into the background somewhere and Naruto just continued making rivals with other people...the only other person was Gaara and quite honestly I would so prefer it if he was the yin to Naruto's yang it actually makes alot more sense since they actually parallel with each other.
They don't necessarily have to be drained they could just make it a giant clash with chidori and rasengan in their bijuu and susanoo forms.
And then Sakura will leap out into the middle yelling for them to stahp. Only this time no Kakashi to save her.