In an email interview with Wired, Wii Sports Resort producer Katsuya Eguchi revealed that, beyond the twelve events included in the final game, even more were planned that didn't quite make it in the game.
"We considered fishing and a water slide activity before deciding on the final twelve events," Eguchi said. We're having a hard time imagining a controllable, skill-based water slide game, which may have been one reason it didn't end up in Resort. "As for more unconventional concepts, we created a pretty fun prototype of kendama, a traditional Japanese toy, that just didn't fit the game's theme." So, a toy didn't fit the "resort" theme, but fighting with fake swords was completely appropriate? Working at Nintendo is complicated.