Electronic Entertainment Expo 2018

Electronic Entertainment Expo 2018 is the 24th Electronic Entertainment Expo, happening in Los Angeles from June 12-14, 2018 though a few publishers have their press conferences in the days prior

Nintendo at E3
While Nintendo's presentation has yet to be announced, Nintendo has announced that they will be holding two tournaments this year. These will be held from June 11-12.

The first is the Splatoon 2 World Championships. It will include the 4 top teams that qualify in one of 4 regions; United States and Canada, Europe, Japan and Australia. The North American team can sign up for the qualifiers called the Splatoon 2 Inkling Open starting April 21. This will be the first world tournament for the game since the game's launch.

The second is the Super Smash Bros. Invitational 2018. It will likely be in the same vein as the Super Smash Bros. Invitational from E3 2014 except this one will be for Super Smash Bros. on the Switch.

Other Press Conferences
Electronic Arts will be holding the EA Play 2018 event instead of going to the Expo again. It will take place at the Hollywood Palladium from June 9 -11.

Bethesda will be holding its E3 press conference on June 10 at 6:30 PDT.