[SPOILER] Why is Wano such a big deal?

I'm mostly a lurker here and on /r/Manga and from just reading it feels like a lot of people are putting a lot of emphasis and hype into Wano.

I realize that a lot of things have been foreshadowed and need to be cleared up, but I'm curious if there's perhaps something missing? I've even seen a comment suggesting that this is the big thing Oda has been writing towards for a decade and I'm wondering what it is about Wano (other than the obvious plot points lined out in the past few chapters) that make it so mesmerizing. (I guess the fact that it is a japanese style country/arc is pretty dope but I feel like I'm missing something)

Don't get me wrong: I'm hyped to just see Zoro back and the fight with Kaidou and the other supernovas should be dope. But I'm wondering if there are other foreshadowed things I'm missing.