Oh, trust me, don't do this. Don't assume that because it's "too quiet" Nintendo has something else up their sleeves. Sometimes they are quiet because they simply have nothing to show, for one reason or another.
Reference: See Nintendo's E3 2008, and that was just two years after they knocked it out of the park in 2006.
Plus, with a new system (hopefully) right around the corner, they could well be focusing their efforts on pumping up its launch library. After all, one of the reasons the Switch was so successful was that it had a killer launch-year lineup, or at the very least a steady drip of content. It's entirely possible that Nintendo will let Breath of the Wild be the Switch's swan song then pad out the year with Pikmin and a couple more little things.
But even if I'm wrong about this year, I don't see the point of making a thread to cheerlead one company for potential announcements and "dunk on" the others. Counting your chickens before they hatch is exactly what made the PS showcase so disappointing for many, and everyone's turn comes eventually.