Thoughts:
Morgan looks way different, although I suppose it's the one where Oda's style has had the longest to mature. His chin-reinforcement is twice the size it was before!
Like the positioning of Kuro alongside Lucci and Spandam. I could see him in a different life taking the path of Rokushiki with his natural speed.
Krieg seems surprisingly unchanged given he's been out of service for a long time.
What's the deal with Mihawk– premium presentation in this calendar, a whole view in the new anime opening-- suppose we're being foreshadowed? And Shanks is an odd choice; every other person on there is a clear villian or potential villian.
Arlong's tattoo has moved several inches up, and his gills have moved several inches down.