i don't think pein will die yet. it's too early for him to die. and i don't think he'd go to konoha knowing theres a good chance he'll die. he'll survive but kill someone before he leaves.
everybody except naruto dies, then sasuke comes and they fight to the death and then everyone forgets about everything having to do with konoha, and the manga abruptly ends.
i think pain will destroy konoha and naruto will be to late by the time he comes he will c alot of people dead and wounded and he will get mad an go after pain himself!
NO....What will happen is the Akamichi (or however you spell it) Clan crushes all 6 of Pain's bodies with their fat body parts and the battle is over. JK
Actually what I think will happen is the 6 bodies get destroyed but then Nagato comes and Naruto fights him.