So according to One Piece Wikia, Luffy got that X scar on his chest from when Akainu punched thorugh Jimbei and hit Luffy with his lava fist. Only another reason for Akainu to be the new Fleet Admiral so he and Luffy can have one of the most EPIC fights in the series.
Best new character design award goes to Ussop. When I first saw him I hated his character and his design. Water 7 and Enies Lobbies his character really came out. Now he has a much better looking body even though he's still a scardy cat. He could maybe even intimidate some fodder people who don't know he's a Strawhat. Nami I didn't think she looked that good but now she's gorgeous. Robin I liked her old hair style more but she's still gorgeous. I feel like Brook is turning into a Bob Marley/Prince character which I think is awesome. I finally get to see Sanji's other eye, and that goatee make him look older and more mature. Zoro look's like Rayleigh during Edd War which is great since he was the first mate to the late Pirate King, just like Zoro will be to Luffy. LOL Franky looks like a bald cyber Hulk. Choppper I'm actually disappointed he didn't change much at all, maybe he'll get a form other than Monster Point that makes him intimidating.
Pray that Franky upgraded Sunny these past seven days with a bunch iof Vegapunk weapons, armor, and doodads for a new EPIC Sunny.
Hoping for a quick Luffy vs. Momonga fight to showcase his new abilities after the way Momonga slashed him during the Summit War. Luffy could even dodge a Nami assault with his new mantra. (forgot the actual Haki color and term)