Wii Sports Resort is pretty packed when it comes to events. However, Nintendo has gone on the record stating that before the final twelve games were picked, the development team had plenty more ideas that very nearly made it onto the disc.
According to producer Katsuya Eguchi:
We considered fishing and a water slide activity before deciding on the final twelve events. 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.
A Kendama is very much like the 'cup and ball' catching toy that we have here in the West. While that might have been interesting to use with the Wii Remote it probably wouldn't have been particularly exciting - as Eguchi himself admits.