I'm guessing these three for the riddle
Metroid
Kirby
Hearthstone
I think something like Hearthstone could be a hit on Switch.
If Blizzard contributes anything, Hearthstone is by far the likeliest for a number of reasons:
- Lean and efficient development team with mobile porting experience; this decision could have been made and delivered on quickly
- The game is built in Unity, already known for rapid porting to Switch without demanding much additional API/platform expertise
- Cross-platform play on the Switch (i.e. support for third-party network infrastructure) has effectively been confirmed by Minecraft cross-play
- Free-to-play—no barrier to entry for new players and minimal risk for Blizzard (as opposed to launching a physical retail title like Diablo into an untested market)
- Exceptional fit for the hardware itself (portable with capacitive touch) in ways already proven by Hearthstone's success on mobile
And let's not overlook how much the Switch would stand to benefit from a game with a huge established user base (with no barrier to adoption on additional platforms, either in terms of price or carrying over user data) in a software environment that currently has no non-demo free-to-start titles.
I'm not getting my hopes up for it tomorrow just because of the riddle game, but Hearthstone on Switch makes a world of sense.