It has now been confirmed via the 1-2 Switch website that the game will have 28 games. We also get a better look at the games via YouTube clips as well as some more information about the variety of games.
1 is single player.
1 is potentially played by any number of people.
7 require the HD rumble.
1 is playable in portable mode (different from table-top mode).
I must say, whilst the game is still looking like it should be a pack-in, it’s at least looking like it’ll have a lot of substance and be a ton of fun playing with friends. 28 mini games means that there’s quite a bit of variety there.
1-2 Switch will launch on Nintendo Switch on March 3rd.