If there is a time that I am getting VERY curious about, it's going to be the Electronic Entertainment Expo (E3) this year.
There is a lot riding on the Switch's success, as they can get a lot of third party support very easily come E3 with many games for the console being announced at the expo, or they may not get as much; and it'll be primarly Nintendo announcing things. If I was to say does get announced..
- Retro Studios Property (Prime 3 or whatever it may be, no Gameplay anywhere)
- Super Mario Odyssey (Full Gameplay at Expo and potentially for certain retailers during the week)
- Pokemon (Full announcement with gameplay at the expo)
- Splatoon 2 (trailer to launch the title)
- Release date on FWW, with Gameplay at Expo (Fire Emblem Warriors)
- the first look at the Fire Emblem Switch title (vague tease like how BoTW was, no Gameplay Anywhere)
- Something unexpected from the first party group of Nintendo (Could be anything like Smash or Animal Crossing)
- Third Party Support of Some Kind (big or small, depending on switch success)