Come in guys think about. They announce stuff this year they gotta compete with all the big relases and the Pro. Plus Nintendo has a couple stuff they want to sell as well. They play their cards now, it could affect sells of their few games and console, plus be overshadow by the pro. they also won't have the element of surprise again. A second direct could not have the same attention if done wrong. They already got a positive first impression which means that when they come back in 2017, people will be listening
In 2017 They got practically no competition, and news travels faster then ever nowadays so a single Direct blowout could very still be on people minds till release date.
Sorry for the weird typing, mobile is acting up on me.