This is my prediction:
BotW2 trailer and release period
Bayonetta 3 trailer and release date
Shin Megami Tensei 5 trailer and release date
Splatoon 3 trailer
Metroid Prime 4 trailer
N64 virtual console coming to the Switch after the E3 direct
New Chibi Robo announcement
Next Fire Emblem announcement
A Mario sports game
Zelda spinoff title to celebrate 35th anniversary
New IP
Indies reel
3rd party games reel
Octopath successor
Not at E3:
No Pokemon because they usually get their own Direct around E3
No new Mario Kart, but finally some F-Zero or ExciteTruck successor
No Switch "Pro" announcement
The Nintendo eShop rating Thread: http://gamrconnect.vgchartz.com/thread.php?id=237454 List as Google Doc: https://docs.google.com/spreadsheets/d/1aW2hXQT1TheElVS7z-F3pP-7nbqdrDqWNTxl6JoJWBY/edit?usp=sharing
The Steam/GOG key gifting thread: https://gamrconnect.vgchartz.com/thread/242024/the-steamgog-key-gifting-thread/1/
Free Pc Games thread: https://gamrconnect.vgchartz.com/thread/248138/free-pc-games/1/