Naruto will fight with Sasuke before attacking Village as sasuke has given promise for that.
now things which will change here are may be like these,
- Sasuke will understand what shinobi is and what is village and why village is important for ITACHI AND SHISUI ahead of clan.
-but he will not accept and make decision where tobirama made mistaken UCHIHAS and forced itachi to terminate uchihas.
-he might not understand the fact why itachi himself annihiliated whole clan...the purpose and itachi and shisui's thoughts on village and clan.
-Hashirama did best but after him the trust between and actions for evil persons like danzous and some uchihas who just think for their benefits rather than thinking for peace and love.
-main thing is that they might fight for tail beasts as uchihas can control them.
-Sasuke will come to battle when hashirama and other hokages will stop madara and jubbi.
-orochimaru might try to gain sasuke after having to do with last zetsu.he must have his cards for getting sasuke.
-Obito will change for sure when yellow flash explain him the real reason.
-hiruzen will stop orochimaru as its his mistake and might come after that to battle.
-hokages will disappeared after battles for peace and 5 kages might enter at a moment when crisis will be high.
-Hashirama might not able to stop as his powers are with madara but surely take him with himself to die.
-obito might sacrifice himself with jubbi after knowing truth.
-real fight start after battle, when orochimaru might try to gain sasuke but as i think sasuke knows what is his planned with his body.
-so he might fight with oro and gain more power.
-then finally when everything will be at bay in world there will be one left and he will be sasuke.
after all these, Sasuke made up mind like he will not kill village but change the fate of uchihas by fighting naruto whom he hated most.he might think that hashirama's ideology was good but people donot change and that cause sacrifices like itachi and shisui so he will chose revenge and destruction of village from where all things start.
then i think last fight will come between NARUTO and SASUKE....the time to change past and fate of uchihas....