There will most likely be a Splatoon 2 Direct for July and then another Direct in August for Mario+Rabbids as well as a reminder that MHXX is a thing for the Japanese audiences.

Don't expect any Directs announcing anything new or detailing previous stark announcements until Summer is over.

Splatoon 2 is almost certainly getting a Direct, that might be in a lot of ways Nintendo's biggest release of the year (yes above even Mario).

Well, I'd hope that there's a Direct in a few months, to show off Xenoblade Chronicles 2, Metroid Prime 4 and Super Mario Odyssey. Well, at least Xenoblade and Mario, I'm not sure when they'll even have footage to show us for MP4. So, I'll say September.

Late July / August / Maybe September.

Hopefully about Virtual Console and that Online Subscription thing.

My main theory is beyond a Virtual Console or similar themed direct, Nintendo might use the directs to announce lower key remasters like what they did with Twilight Princess HD. Not something like Smash 4 Deluxe, but more low-key releases that fill in gaps that the console doesn't have. 

Or even to build up for the 2018 year.