After the movie,all possible dangerous villains will be gone with Sasuke not fighting Naruto again.So there will be no part 3.The only things we can see in part 3 are relationships and drama
Oro finds all those uchiha eyes. Re-animates fallen uzumaki, uchiha, and hyuuga clans implant dna into himself and becomes supreme. With a army that can't be destroyed that easily lol or something.
Nope. Danzo could become a main villain. Danzo could've used izanagi just like Madara did. Or when orochimaru was force to leave the village in a hurry, he didn't have time to take his research with him. SO Danzo probably got his hands on it and sold it to other people. There is always a villain plotting like a master mind in the shadow. XD
Given the revel that otsuki came from another place (space), they might obtain some way of spacial traveling from Tonori(if thats his name), I mean how did Hamura go to moon? I don't know but at this rate Ninjas In Space seems possible.
He nations go to war with each other again and Naruto admits he is wrong to Saduke and then they team up to fight the other villages it would be like leaf cloud and Sand fighting the mist sound rock and waterfall and all those other BS villages