Everyone with a brain knew Sanji was going to unlock Supreme King Haki. Sanji fans have something to look forward to in the next few chapters.
I'm very excited to see what Zoro's upgrade is going to be. I would LOVE to see Nine-Sword Style mixed with King of Hell. Or potentially even more progress towards turning Enma into a black blade.
All I know is, in the next 10 chapters, Zoro and Sanji will Mid-Diff Law and Kidd.