The 5 seconds left,4 seconds left thingy made me think of an action movie compressed into 17 pages.
I would like to see Nagato realize the extent of what he has done. That isn't entirely impossible because this is Naruto we are talking about. He has a incomparable power to change people. Still there's also the Nagato who was willing to do anything to make his voice heard regarding peace. He chose the ruthless way and stayed like that until all his puppets were demolished.
I believe if Nagato changes it won't be so fast. Naruto will have to really talk something miraculous to change his mind and it has to happen while Konan agrees to stay put. Madara would surely know the extent of Pain's abilities so I think he will not come until the last moment, whether to laugh at him or commend him for making it this far............as his puppet.