Dude, the sole mission at Reverie was to "SAVE KUMA" and announce the answer of declaration of war.
Sabo even himself admitted during the infiltration that they came there mainly to save Kuma. So, that is NOT going out of plan here. saving Kuma is the main plan itself. And declaration of war was something inevitable. Like I said, I'm disappointed in the way Oda handled Dragon's action in this reverie. It only reflects incompetence on Dragon's part.
Don't get me wrong, I am not saying he's weak. Hell I already ranked him above some Yonko for god's sake! It's just he did NOTHING in reverie when he's supposed to be the MAIN EVENT of reverie!
That's fucking shameful.
True. I just re read the chapter and Karasuno said it's the reason why they were there, my apologies.
Though, remember, we don't know how things really went down, Bonney was there and she might have helped in some way, I don't think Oda would place her there just for us to see her cry about Kuma and then never appear again.
Dragon said that he will come if the news about Sabo being captured is true, which I'm leaning for it not to be true because the WG is known for wanting to make themselves look good.
I strongly believe a lot more happened than what we are being told right now. Perhaps we need to wait until the scans are released so we can understand exactly what the news about Sabo is, since there are a lot of new info coming out.
Who knows, maybe Sabo really did kill Cobra.