There's a lot of plotlines that seem to be spinning out of this, which is why One Piece is so great.
Until it's confirmed we can only guess that Law's plan involves the other Supernovas and Big Mam but that's looking most likely. And Big Mam's tea party was scheduled for four days after the end of Fishman Island arc. Punk Hazard has so dar taken maybe a day (?) so that deadline's looking kind of important. Maybe most of her major players are going to be there as well maybe including an army of SAD Zoans possibly hypnotically primed by Doflamingo and including an explosive casket that can be blamed on the Straw Hats.
Depending on how PH plays out then maybe the Straw Hats are going to be transporting CC and/ or Shinokuni weapon which would make them a huge target for all those mysterious weapon dealers we've been seeing in the shadows.
There's Kinemon and Mononosuke maybe needing a trip to Wano Country, the kids and the mystery of the frozen bodies (the source of SAD?).
Edge of the seat stuff and the wait between chapters seems to get longer and longer every week!