Vegapunks and Luffy's group will either look for Bonney or go to the Sunny to help with fighting CP0. They could also split up into groups and do both.
Then we have CP0, who either will fight Zoro and Brook 2 vs 3 or again will split up tp go, search for Vegapunk.
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Caribou is also still on the island.
Then we still don't know who turned off the shield - maybe that is revealed.
And finally as it was already said - the person from the Den-den-mushi could be revealed.