I've read the summary and haven't gone over it in the finest detail, I'll admit… but something strikes me as off about this. I trust and respect Oda, and that's why I say this
Ace is a huge figure. I'm not saying he's not going to die, but this death makes me skeptical. He's fairly key to the story/history/world, he's loved by the fans, and he's strong even for a Logia. the fact that he's one-shotted (even after prison for who knows how long; I mean, Buggy and Mr 3 could even fight after Impel Down). He got out of his cuffs and kicked as much ass as anyone else there, and get's suckerpunched to death after raging for 5 seconds?
Ace's death feels pointless. It's not so much a sacrifice as it is like saying characters can't develop without someone they love dying. Ace essentially lays there and dies, and whispers goodbye? I have to call bullshit, because Oda works better than that. whenever someone in the past has died, they had a big impact. BIG. Ace's felt.... kind of bland and flavorless. I mean, at Least Going Merry popped out of nowhere to save the entire crew. the boat had a better death than this!!
here's hoping Ace is holding on within an inch of his life. ideally to let the attackers escape before self-desctructing and burning the island to the ground. it's the best i can think of at this point, but I'm sure Oda could do better than I ever could