Out of the 6-ish games that are coming out for the Switch, there is no particular one that I am really, really excited for. However there is one that I might look into.
Bayonetta 2 (Also on WiiU)
So this game was also available on the WiiU, so I might just see if I can find a used copy for cheap. I have played the PS3 version of the first game otherwise. I remember the gameplay being fun, but the sequel was only released for the WiiU. Not sure what the story is there.
See the full list of games: http://www.ign.com/upcoming/games/nintendo-switch