2023 has potential to be the greatest year of Nintendo Switch for me, and I'm very excited to see if it lives up.
Due to its success on 3DS, I believe that a new Tomodachi game has been in development for a while and should be ready very soon. It could very well make the February Direct for me.
For some reason I just can't shake the feeling that indieszero has been co-developing a new Rhythm Heaven since around the time Big Brain Academy wrapped. Maybe it's overly optimistic, but it seems like multiple people at Nintendo, as well as Tsunko, have an interest in the series.
Similarly, due to Takahashi's comment in 2018 I believe that Wave Race will return. Wave Race 64 was a significant moment for so many who are now very important at Nintendo: Eguchi and Takahashi directed, Totaka composed its music, and Miyamoto was, of course, producer. Unfortunately, I suspect that the most natural form for a new game to take is a launch title for new hardware to show off its graphic processing power, so I'm not sure that it will arrive any time soon.
Finally, if Pikmin 4 actually makes it out this year it will be very exciting for me.