I personally believe and want the raid to fail because I think it makes more sense thematically.
The alliance attacked an island with two Yonko with smiles on their faces and jokes on each page, if the raid is a success it means that Oda failed to give it the seriousness and intensity that this event deserves and I honestly believe that Oda is a better writer than that and can generate very good atmospheres.
The Straw Hats must grow into a crew that rivals a yonko and for that growth to be logical and justified they must first fall. The raid must fail to destroy this overconfidence and eternal joy that Onigashima has delivered, so I believe that they must lose, grow and fight again to win.
The alliance attacked an island with two Yonko with smiles on their faces and jokes on each page, if the raid is a success it means that Oda failed to give it the seriousness and intensity that this event deserves and I honestly believe that Oda is a better writer than that and can generate very good atmospheres.
The Straw Hats must grow into a crew that rivals a yonko and for that growth to be logical and justified they must first fall. The raid must fail to destroy this overconfidence and eternal joy that Onigashima has delivered, so I believe that they must lose, grow and fight again to win.