First things first, I'd like to make it clear that I have NOT seen the Direct for E3. These are not leaks from this direct in specific, though from the info I have it's likely that most of this stuff will be shown in the Direct. Secondly, I am only listing NEW announcements. Things for already announced games like Astral Chain and Fire Emblem won't be listed here, but will be present in the direct.
So, hello Yea Forums. I work at a social media management firm who is responsible for operating Nintendo's social media accounts. I'd like to remain anonymous right now to protect my identity/job.
We already have tweets scheduled for next week around the same time as the E3 Direct, and I'd like to share all I can about the things we will be relaying on the Twitter next Tuesday. Please note I don't have super specific details because I only have access to the scheduled tweets, which don't carry a whole lot of information:
Smash Fighter 2 (Sora) and Fighter 3 (Banjo and Kazooie). Sora will be available on June 19, Banjo will be available later this summer.
Overwatch is coming to Switch later this year.
The Witcher III: Wild Hunt is coming to Switch in the fall.
Apex Legends will be available to download after the presentation.
Kingdom Hearts: The Story So Far will be available on August 15th.
Persona 5 Royal is coming to Switch next year (yes, I know, but I swear)
Luigi's Mansion 3 will be available this October. No specific date yet oddly.
Animal Crossing: Metro Mania will be available on September 20th.
Link's Awakening will be available this holiday.
Cadence of Hyrule is available after the direct, same goes for A Hat in Time.
Borderlands Trilogy will be coming to Switch later this fall.
Rage 2 is coming to Switch. I don't know when.
Shin Megami Tensei V is given a tentative release date of Q2 2020.
Rare Replay will come to Switch, adding in Rare-developed Nintendo titles.
Halo: Master Chief Collection is also coming.
That's about it, I think.