The ESA (the organizers of the event) recently published a press release in which it confirmed that Nintendo will be one of the attendees this year. “Several leading video game companies have already committed to participating in E3 2020, including Xbox, Nintendo, Ubisoft, Bethesda Softworks, SEGA, Capcom, Square Enix, Take-Two Interactive Software, BANDAI NAMCO Entertainment America Inc., and Warner Bros. Games, among others.”
However, this shouldn’t really have come as a surprise as earlier this year, Nintendo’s President of America Doug Bowser actually confirmed with The Hollywood Reporter that they are planning to attend the event this year. “We look forward to participating in E3 2020. It is one of many ideal venues for us this year to interact with people in a social and immersive environment. Every year, we base our approach to E3 on the content we have to share.”
It is unclear as to what new games or hardware Nintendo has planned for the event, so we will just have to wait and see.