The Twitter account @andand_AP recently uploaded the results of an interview with Oda, the creator of the One Piece character. According to Oda, Wano arc is a very strong story related to the final part of One Piece.
For information, arc is a term to refer to a collection of chapters of a comic that has the same topic. Stampede itself is the most successful film recorded in the history of the One Piece franchise. Eiichiro had said, his last manga was far more interesting than Stampede. "This will be the best One Piece (Stampede) film so far. However, the final stage of my manga will be much more interesting," Oda said.
Naito, editor of One Piece, said that this flashback will reveal the legendary adventures of Roger. Wano arc is the most important arc that will be associated with the biggest secret about "What is ONE PIECE (as a treasure)?". Naito even said, Wano is an important arc that will make fans who have stopped reading One Piece will return to read it.