Well after Team Jins managed to defeat the Akatsuki...here's how it'll end when Nagato comes.
(This post is based off the idea that Nagato won't revive the Akatsuki. Got it punk!?)
When he comes, most of the Jins should've been pushed into their full forms. Let's just say they've all fully transformed by now. Actually it's cannon that all the jins are now best pals with their Bijuu thanks to Naruto. Well with the exception of Gaara but I'm sure Shukaku will be converted with ease
Naruto would communicate with everyone in the mindscape and give them full knowledge on everything. Maybe to Naruto's surprise all the Tailed Beast know what the rinnengan is capable of already.
Now it's time for the confrontation. Nagato would kick it off most likely by summoning every single summon he has, or Gedo Mazo or both. Gedo without the Bijuu in him seemed powerless however so I doubt it'd come. So with all of his summons out..the Bijuu would prep TBBz...
Nagato would ST them away instead of waiting to absorb the blast since he'd want to keep his summons around and don't want them incinerated.
Son Goku kicks every summons ass!!!
LIKE A MAN! lol
Cerebus gets buried while the Six tails spouts it's poison gas on it.
Seeing this rape, Nagato stands(like a BOSS) and contemplates his next move. Naruto tells Gaara that they need to block the rinnengan's field of vision. He and Gyuuki then do a combination attack to create a huge sand storm. Naruto then goes BM and goes in for the blitz. I'm 90% sure Nagato will get hit by this. He's a sensor yes but with so many large chakra signatures around it'll be hard to detect shit.
So if he gets blitz, IDK if he'd survive. He managed to not die by Bee's lariat because well...Bee stayed connected to him a little longer than he should. With the momentum Naruto would kick/punch him with...he'd have no time to Preta off chakra. Even if he did, it wouldn't be a significant enough amount to heal the injuries IMO.
If he survives then IDK...I just...Dont...know...where the fight could go from here. Let's think about it. What can Nagato do to kill the Bijuu? Nagato's strongest attacks are all blunt force which...I'm sure, every Bijuu can tank. CST/CT...whichever, the Bijuu can survive it many times over.