Dammmnnn… this Sugo and French Anni events. Global Anni feels even worse now
So, you can choose one of this Legends after clearing the Sea Beast Quest five times: G4 Luffy (basically Snakeman), V1 Nami, V2 Sanji, V2 Zoro, V1 Robin. That's really great for me as I only miss Robin out of these and there have been several teams where I really needed her. As for overall I think most newer players would have rerolled for Snakeman and will now go for Nami. For those who don't have Snakeman that's a great opportunity to get him
Also: All guaranteed legends on this Sugo are going to be >Feb 2018 (Lucy being the oldest unit, and most of the availiable units being quite usefull). That's a total of 54 legends, 14 of which debuted this year. So for each guaranteed legend there's a 25% chance to be a 2020 legend. As I miss all of them it's really tempting to go for the 5th multi and probably get one or two of them...
--- Update From New Post Merge ---
Is my main team on Treasure Cruise good or not?
Kaido (Dex)/Kaido (Dex)
E.S.F.H.P. Big Mom (S)/ Gear 4 Snakeman Luffy (S)
Straw Hat Luffy's Conspirator - Sandorsonia (Dex)/Coliseum Smoothie (I)
You also should think about taking the DEX (Striker!) Nami for free, she's a great unit with two Kaidou captains…