what arc is after thriller bark

The arc that comes after Thriller Bark in One Piece is the Sabaody Archipelago Arc, which is part of the Marineford Saga. After leaving Thriller Bark, the Straw Hat Pirates accidentally get caught up in the Sabaody Archipelago, where they discover that they need a special method to get to Fish-Man Island. They then have to stop by at an archipelago to do the thing, but things go sideways, kicking off a whole sequence of events that needs to be done before they can get back on track. It is worth noting that every arc between Thriller Bark and Fishman Island belongs to a massive saga with an overarching objective.