Board Thread:Naruto Discussions/@comment-33156423-20171003020659/@comment-26636534-20171019190517

Definitely the Sannin, when they were only genin and under Hiruzen's guidance. That would be separate enough from the main storyline to be new and exciting, all the while being familiar and similar to part 1.

Miss the part 1 setting, also would give us the chance to see prime Hiruzen in action, prime Sakumo...

Other than that, something completely different. Such as Amegakure before, during and after Konan died, with new interesting characters. Only dreams now...