I was hoping for a Nintendo Direct in August just because I enjoy them and the experience around them. I believe NOA and NOE are capable of producing their own Directs. On a sadder note, NCL has had an Iwata-less Nintendo Direct for Japan this year.
As mentioned by others previously, there isn't too much news for Nintendo to share for the rest of the year. The only potential titles to go further in to detailing are Star Fox Zero, Animal Crossing amiibo Festival, Tri-Force Heroes, and a few others. Not a flashy or inspiring show to put up.
We might see game-specific and region-specific Directs for games such as Xenoblade Chronicles X and Fatal Frame: Maiden of Black Water. Fatal Frame is a long shot given it's an eShop-only title in North America, and that there is little you would want previewed of a horror game. Along the same line, Xenoblade Chronicles X already had an abridged version of NCL's pre-release coverage. While I would love to see an official English version of the hour and a half of Xenoblade Chronicles X digest videos, that is far too much.
What has the best chance of bringing a Nintendo Direct to stream? Nintendo's first smart device game.