You know what's really interesting about these spoilers? Almost everyone just assumed Luffy had mastered G4 like it was a foregone conclusion, myself included. It's the MC of a shonen manga bias, no one wants to downplay or question Luffy in terms of power. They're scared that If they do they'll just be handed an L. But because no one really ever questions Luffy's strength, stuff like this goes under the radar.
On the flipside if Zoro does anything, you can bet your ass all factions of other fandoms will be at his throat. I guess that's also because his fans are also quick to wank him into the heavens.
Maybe if even a fraction of the Zoro wank and downplay went to discourse about other characters it wouldn't be such a disappointment that Luffy ran out of haki yet again. Because if we did discuss that stuff, then a larger part of the fanbase might have seen it coming. But hey, I mean it's more interesting to debate about the semantics of "Look out!" and "Dodge!" for hundreds of pages instead am I right? If people weren't so salty they could quite clearly see that the point of that scene isn't really about the words but the nuances and implications of it.
Well even now I think the whole running out of haki thing is just a plot device. It creates tension and we get to see some of the other supernova shine, then Luffy will later reveal his cards. Maybe show G5 with more efficient haki usage or something. What I'm getting at is One Piece isn't about power levels. Oda just wants to show cool scenes and symbolism and he'll give quick nerfs and powerups to show them. So if you can't even entertain the thought of things like ZKK you're just going to continue to have a bad time. My thoughts on ZKK? If Oda goes through with killing Kaido then I think ZKK will be very plausible. If he doesn't, Zoro will do significant damage. It can go either way (Just my thoughts on ZKK if you guys are curious about how biased I am on that topic and where I stand on the Zoro wank scale). And the reason why Zoro will play a significant role (and it has nothing to do with powerlevels) has quite clearly been alluded to at length and has been much better outlined than I would be able to do it by users such as
@Cinera .
His thread if you guys want to check it out. Who knows? Just some food for thought to maybe start discussing other characters.
Then again I'm not one to ruin, the fun... so I guess I'll just join in on the trolling and do a quick
tl;dr :
Remember how people said we might as well give Enma (Oden) to Luffy and have him finish Kaido? Well, it turns out his reserves of haki are so bad he'd be one of those people who would have died if he swung it.