I have a strong feeling that Nintendo is going to use Smash Brothers characters to introduce each new title announced or showcased, known and unknown. Keep in mind that the Direct will be about 45 minutes. Here is an example of what could be revealed (R stands for Rumored):
Samus Aran - Metroid Prime 4 trailer
Bayonetta - Bayonetta 3
Yoshi - Yoshi Flipped
Crash (R) - Crash Trilogy
Spyro (R) - Spyro Trilogy (R)
Star Fox - Star Fox Grand Prix (R)
Pokemon Trainer, Pikachu, Eevee (R), Charizard, Jigglypuff, MewTwo, etc. - Pokemon Let's Go
Animal Crossing - Animal Crossing (R)
Ice Climbers (R) - Ice Climbers NES
Captain Falcon - F-Zero (R)
Pikmin - Pikmin 4 (R)
Ike, Robin, Lucina, etc. - Fire Emblem
Captain Toad (R) - Captain Toad Treasure Tracker
Simon Belmont (R) - Castlevania collection (R)
Snake (R) - Metal Gear Port/Remake (R)
Sonic - Sonic Racing
MegaMan - MegaMan 11
Link, Zelda - Skyward Sword HD remake (R), Link's Awakening Remake (R), or BoTW past game footage reference
Splatoon - Splatoon 2 Octo expansion or past game footage reference
Springman, etc. - ARMS past game footage reference
Kirby - Kirby Star Allies past game footage reference
Donkey Kong - Donkey Kong NES or Donkey Kong Tropical Freeze past game footage reference
Mario, Peach, Luigi - Mario Maker 2 with new additions (R) or Super Mario Brothers 2 NES or Mario Odyssey past game footage with new playable characters DLC
Last edited by zygote - on 08 June 2018