Couple of thoughts:
- Arc seems to suggest CP-0 will be the main antagonists (they want to kill Bonney and Vegapunk)....but I can't see Oda recycling Lucci as a main villain. Either someone else is coming via Marines or CP-0 has additional members far stronger than Lucci and group.
- Not sure what the play will be with the Seraphim. We know 2 of them are on the island rn, but who knows what their true deal will be.
- Smoker is still MIA, as is Sentoumaru.
- Curious what Kuma is about to do. Running isn't going to get him far unless he teleports (however, I can imagine Seraphim Kuma had those powers taken from the real Kuma).
Still a lot of loose threads, but nothing ridiculous like Wano right now. Arc has the potential to last as little as 20 chapters or be longer (like 50-60) depending on what follows...