A new DKC game
A new Kirby's Dreamland game
Pokemon RPG
Diddy Kong Racing 2
Balloon Fight Remake

Metroid 2D
Metroid 3D
Chibi Robo Sequel
Secret of Mana Sequel
Elebits Sequel

1) Metroid Prime style game with botw engine, no man's sky layout.
2) Animal Crossing
3) Pokémon huge expanse (botw) game using phone connection like Pokémon go for some elements when in travel.
4) RE local multiplayer title that isn't a spinoff. Work together to solve puzzles, survive, and investigate in controlled sandbox style.
5) More original multiplayer experiences both small scale and large scale.

Gonna think of more later, but for now I just need a Megaman X reboot

Proper Metroid
F-Zero
Star Fox
Proper 3D Donkey Kong(Like Donkey Kong 64)
Kirby
Castlevania HD Remix
Contra HD Remix
Super Smash Bros. 5
Turok HD
Yoshi
Super Mario Maker 2

Every Nintendo game ever!

Alright I'll list some specifically:

More great new IPs like ARMS and Splatoon
Mario Kart 9
Smash Bros. 4 Switch
Lugi's Mansion 3
Zelda BotW 2
Kirby
Pokemon
Animal Crossing
Advance Wars
Battalion Wars
Kid Icarus Uprising port/sequel
2D Metroid
Mario Strikers
GOOD Mario Party
GOOD Paper Mario
GOOD Star Fox

These are not my E3 expectations of course.

New Donkey Kong Country
Skyward Sword HD
New Animal Crossing
Luigi's Mansion 3
Super Mario 3D All Stars (64, Sunshine, Galaxy, Galaxy 2, 3D Land, and 3D World all bundled together and remastered in Odyssey's graphics.)
Persona 5 port (Most likely not going to happen, but let me dream damn it!!)

1. Metroid
2. Luigi's Mansion 3
3. Paper Mario (like first 2 games) or Super Mario RPG 2
4. Pikmin 4
5. Pokemon

Endless ocean is all i need

Endless Ocean 3
Animal Crossing Switch
Switch Sports Resort
Mainline pokemon game
Pikmin 4
Smash
New western RPG from Retro
Rhythm Heaven