But they have had products to hype and announcements have been made:
This month: Fatal Frame announcement, Mario Golf release and demo, DLC announcement, NES Remix 2
Last month: Smash Bros information, Mario Kart trailer, Tomodachi Life announcement, Zelda DLC in Sonic
Previous month: Sonic Boom announcement, GBA VC trailer (with dates)
I'm not saying these are the biggest announcements or the games most in need of hype, but last year each of these lists could be the main headlines to come out of a Direct.
And in each instance, these announcements landed within a few days of each other, about a month apart, as though the plug had been pulled on a Direct!
And we know that there is information that they are sitting on, we haven't heard anything on the following games since their announce; Yarn Yoshi, SMTxFE, Sonic Boom, Hyrule Warriors. These all have 2014 release dates as well, although whether Yarn Yoshi and SMTxFE still exist is unknown.
On top of that we know that Retro is hard at work on a new project, that Miyamoto has a new IP cooking, and that Nintendo has an NFC project in the works. Whether or not these are 3 separate projects or not is unknown.
But it definitely seems as though information is being held back for E3. But also that Directs have been cancelled at the 11th hour.