While yea, Hiyori wants to kill him now, I don't about the theories of Kyoshiro wanting to take over. People keep bringing it up, but it doesn't have any actual evidence that points towards it. They just think it's a possibility because he looks so very shady, which well, okay yea he totally does. 
But my main issue with it is that Orochi isn't by himself, he has Kaido's backing. Hell, we don't even know what their relationship is like yet. Kyoshiro can't just simply kill him and install himself as Shogun, and then expect Kaido to be totally cool with that. Why should Kaido and those who work directly under Orochi accept a new status quo? So if Kyoshiro really does have those kind of aspirations, he has to find a way to make Kaido cool with it. I'm not sure what type of deal he could realistically offer that would interest someone like Kaido.
It's a theory I wouldn't mind coming true, as I love Kyoshiro, but I just don't see the story going in that direction. Though I am interested in seeing if Oda actually does anything with Hiyori's desire to kill Orochi herself.
@Sengokusgoat:
But the beef Zoro has with Orochi is so…random and out of nowhere. He wants to avenge Yasu? Since when are they close enough for that? We've seen them talk like a couple times. I think if Oda really wanted to have something meaningful come out of that relationship he would have bothered to show them bonding or something, just like Luffy with Tama , so the audience can actually be invested in it.
The matter of how invested people are in Zoro wanting to avenge Yasu is completely subjective though.
That said, nothing about it is random at all. Zoro's the only one aside from Luffy that got an opportunity to bond a little with the people of Wano. Yasu, Toko, Ebisu Town as a whole, that's all of what was on his mind when he attacked Orochi with the intent to kill him. Zoro's motivations are just fine regarding someone as vile as Orochi, especially when him and the rest of the Strawhats have done this kind of stuff for far less in the past. Luffy in particular, you can simply give him some food, and he'll basically be your bud for life. It's just how the Strawhats roll. Though I will say that the anime could and should expand on his time with Yasu (including showing how they met) and Ebisu Town when it reaches that point.
