Can't wait for more Vivi. If she sails with the crew again, there'll be two D's on the Straw Hats. Pretty important reveal, this flashback wasn't for nothing, I knew Oda would drop something good atleast. Cobra and Vivi were always two strong-willed and great characters and I'm glad they're getting extra relevance with the D reveal.
Can't wait for more exploration on Lily. The implications of Lily being a D are interesting to consider, so a member of the D clan was invited to join the World Governmennt way back when, did her refusal mark the start of the belief of the D's being the natural enemies of God or did that occur before this event? Probably before but now it begs the question of was she aware of being a D and if so, aside from refusing to join the other nations, what did she do before that point?
When they say Shadow Arrow, do they just mean silhouetted arrows or a potential fruit abilty? Maybe the former but I wouldn't mind the latter, would fit for such a mysterious character. Would probably get memed on for essentially having the silhouette silhouette fruit.
Hopefully Oda finds some use for CP0 after bringing them back, Lucci's been good and Kaku's been decent but the rest being around leaves me wondering if they'll amount to anything in the New World aside from the title of being the best CP group which they already were before the reveal of this secret, secret agent group that they all joined anyways.