OOPS I guess they didn't think of that, Sasuke's going to be pissed mad
... Or they'll just have a "shared thoughts/memories" moment to bring some dawwwww, which Sasuke will promptly ignore to show how much of a douche he's become and for the story.
If I struggled to the end of my determination, to the end of my way of life with my followers, if the result is ruin, then this ruin is inevitable. Grieve. Shed tears. But you cannot regret.