The edo tensei technique needs to be put to bed. It's been done to death. Every time it's used it cheapens the effect. I think original techniques at this point in the game that touch on all of the principles explained would make for an excellent finale. Sasuke doesn't seem evil just still misguided. Unfortunately, it steals his ability to be original at this point. Any type of revenge he attempts at this point will have already been done by someone before him. Unless he succeeds then he will not have the same effect as an uchiha avenger as madara has. Not as a missing nin as kabuto or Orochimaru. Any Avenue he explores through force would be a copy of someone else's path
I would be surprised if he took a diplomatic approach through dismantling konohaka as an official