Nintendo has a Direct scheduled for June 9.
The company confirmed the presentation with roughly 24 hours' notice — a window that has become something of a Nintendo trademark. Directs are the company's main broadcast format for upcoming games, DLC, and the occasional hardware announcement, and they have largely supplanted the sprawling live press conferences the industry once ran at E3 and similar events. No runtime or topic list was released alongside the announcement.
The minimal lead time is a deliberate posture. It limits the speculation cycle Nintendo would otherwise have to manage, and it keeps the company from having to deny or deflect rumors ahead of the stream. Sony and Microsoft have generally leaned into longer pre-announcement windows with dedicated showcase events; Nintendo keeps its schedule opaque until close to air.
Directs range from landmark franchise reveals to quiet slates of release date confirmations. There is no reliable signal ahead of time for which kind this will be.