The Date of the direct is currently unknown
The list of known reveals are:
The Legend of Zelda: Ganon's Wrath
First fighter in DLC Pack 2
Super Mario Party 2
Pikmin 3 Rebloom
Updates to the switch UI
Persona 3, 4, and 5 ports
An update to Super Mario Maker 2
Star Fox Revolt
Loz:GW will have Zelda as the main character. At the beginning of the game, Zelda will have a weak Bow of Light that gets upgraded over time, and all runes from BotW, excluding the master cycle. One new rune will be added to replace Revali's Gale. There will be new enemies, including new humanoid guardians, mimic enemies, and Earth elemental enemies. Also, guardian scouts will now appear on the overworld. Three new weapon types will be added, flails, gauntlets, and staffs. An enchantment system will also be added to the game. It will release on December 10, 2020.
The first fighter in DLC pack 2 will be Toxtricity from Pokémon. The stage will be Wyndon Stadium. The DLC will be released on May 3, 2020.
Super Mario Party 2 will have a story mode and a full online mode. There will be 4 new and 2 returning boards. Many features from SMP1 will be removed. There will be DLC for the game. It will release on October 10, 2020.
Pikmin 3 Rebloom will be a port of Pikmin 3 to the switch with all DLC included and an added epilogue. It will be released on July 13, 2020.
Updates to the UI include folders, new themes, and new icons.
Persona 3, 4, and 5 will be released on December 15, 2020.
Mario Maker 2 will have an update announced. The additions announced will be a Super Mario Bros. 2 theme, fuzzies, shyguys, chargin chucks, and the ice flower. The update will also add some items exclusive to the 3d world style to other styles. The update will be released on August 17, 2020.
Star Fox Revolt will have the main characters from Star Fox 2 return. The game will be in the Star Fox Zero engine. It will be released on November 13, 2020.