Personality switch, just like I thought. One additional and a pretty underrated hint was the make up he used aswell. Similar to the theme that pyscho clown/joker theme, it can mean that you're acting all well to the outside, while you are plenty fucked up inside. The two faced thing
Also shows the link to his theatre/acting background.
But yeah, I'm not really surprised. What hypes me up is that Kid, Luffy, Law panel. Oda will go overboard with those guys. And their clothes really do their job just fine. They look freaking epic.
I'm so fucking pumped for Onigashima, it's unreal. What a time to be an OP fan. Those hybrid modes, Zolo with Enma, RS Sanji, the leader trio, the emperors, the numbers, the flying six, hybrid Drake.. Every chapter where one of those like 20+characters are in action will be extremely cool to see. So chances are high, that there are a whole lot of very cool chapters incoming.
Brah, Momonosuke gets hostage'd tho? Hmm..