I certainly hope Kingdom Hearts 3 is at E3. I'd love at least another trailer and release year. 

I'd also like to see more on Xenoblade Chronicles 2, Mario Odyssey and Ni no Kuni 2.

My other wet dreams for E3 are Kid Icarus Uprising 2 and Luigi's Mansion 3 announcements.

And I kinda want to see more on that Cyberpunk game by CD project red, it looks really interesting.

@flashfire926

All your predictions seem like pretty good bets. Realistically that's probably what it will look like with a few surprises here and there. I have a similar basis but I want to believe a bit more.

Nintendo:

• Many older enhanced 3rd party ports
• Virtual Console Gamecube and Wii games
• Fire Emblem games
• New Animal Crossing
• Splatoon 2
• Xenoblade 2 (Gameplay)
• Pokemon Stars (With analong camera control)
• Retro Studios new IP
• Mario Odyssey
• Rabbids Mario RPG
• Bayonetta 3
• New Kirby
• New Pikmin
• Yoshi Wooly World 2
• New Smash
• New Metroid
• New Donkey Kong
• Eternal Darkness 2
• New Lufia
• Some "indie" new IPs for Switch
• Two new unnanounced IPs

Microsoft:

• Scorpio reveal
• Microsoft VR
• Sea of Thieves
• State of Decay 2
• Crackdown 3
• Below
• Cuphead
• Forza 7
• Shadow of the Tomb Raider
• Phantom Dust
• Battlefield 5
• Halo 6 (for 2018)
• Halo 3 Remastered (for 2017)
• Many indie type games similar to Inside, Ori, etc.
• Fable 4
• Banjo Kazooie 3
• New Conker Game
• Voodoo Vince 2
• Access Games new IP (D4 and Deadly Premontion guys)
• Three new unnanounced IPs

Sony:

• God of War
• The Last of Us Part II
• Wild
• Knack 2
• Kingdom Hearts 3
• Dreams
• Resident Evil 2 Remake
• Final Fantasy VII Remake
• Crash Bandicoot Trilogy
• Crash Bandicoot
• Spiderman (Gameplay)
• Gran Turismo Sport
• Deep Down
• Days Gone
• Shenmue 3 (Gameplay)
• Detroit: Become Human (Gameplay)
• Ni No Kuni 2
• Death Stranding (Trailer)
• Dragon Quest XI
• That Game Company new IP
• Destiny 2
• Call of Duty 2017 (WW2)
• Red Dead Redemption 2
• Sucker Punch new IP
• Bloodbourne 2
• New Ratchet and Clank
• Bully 2
• New Wipeout
• Chrono Trigger 2
• Catherine 2 (or spiritual sucessor)
• Two new unannounced IPs

Electronic Arts:

• Sport Games (All on PC finally)
• Mass Effect Andromeda
• Bioware's New IP
• Star Wars Battlefront 2
• Visceral's Star Wars (Gameplay)
• Need For Speed Underground 3
• Need For Speed Edge (Free to Play)
• Indie support in vein of Unravel
• New Dragon Age
• New Burnout
• New SSX
• Alice Madness Returns 2
• Mercenaries 3
• Shadows of the Damned 2
• Bulletstorm 2
• Two new unnanounced IPs

Ubisoft:

• South Park Fractured But Whole
• Just Dance 2018
• Beyond Good & Evil 2
• New Assassin's Creed (for 2017)
• New Prince of Persia (for 2018)
• Far Cry 5
• New Rayman
• New Splinter Cell
• Child of Light 2
• New Call of Juarez
• New Anno
• One new racing game
• Two new unnanounced IPs

Bethesda:

• Prey 
• Quake Champions
• The Elder Scrolls 6 (for 2017)
• New Wolfenstein
• The Evil Within 2
• Two new unnanounced IPs

Other:

• Cyberpunk 2077
• Psychonauts 2
• Vampyr
• Agents of Mayhem (Gameplay)
• Project Sonic 2017
• Life is Strange Season 2
• New Katamari
• New SoulCalibur
• Bandai Namco new IP action adventure game
• Condemned 3
• Alien Isolation 2
• New Sonic All Stars Racing
• Sega New IP 3rd person action adventure shooter
• Sega New IP Action RPG, in vein of Alpha Protocol
• Okami 2
• New Devil May Cry
• Dragon's Dogma 2
• Ghost Trick 2
• Asura's Wrath 2
• Remember Me 2
• Just Cause 4
• Sleeping Dogs 2
• Rule of Rose 2
• New Vampire The Masquerade
• Protoype 3
• New Transformers
• Castlevania Lords of Shadow 3
• New Silent Hill
• Many many amazing indies
• Many many more new IPs