So, in terms of what seems likely based on reliable leaks and rumours:
- Smash News: Banjo release date (later this month), fighter 4 is Terry Bogard
- Assassin's Creed 4 Remastered: includes Black Flag and Rogue
- Overwatch for Switch
- SNES games coming to Nintendo Switch Online (and possibly more systems but on a more expensive subscription option)
- More Capcom ports: Dead Rising, more Devil May Cry games, Mega Man ZX Collection
- A GameCube game that flopped commercially is remastered/ported - not clear if it's first/third party, but I'm thinking it'll be something like Viewtiful Joe
- Borderlands comes to Switch
- a 2013 Wii U title is ported to Switch in early 2020 (Pikmin 3 or The Wonderful 101 are the front-runners for this)
- Nintendo have a surprise new release for Switch launching as early as December - probably a smaller, family-friendly title
Basically, expect the usual mixture of third-party ports (some more exciting than others), indie games, updates for existing games (Luigi, Pokemon, DLC details for Fire Emblem), and some new first-party things from Nintendo - I'd expect we see two or three Nintendo games for 2020, with one of them a Wii U port.
I don't expect to see Breath of the Wild 2, Shin Megami Tensei V, or the rumoured, Switch-exclusive Monster Hunter.
