With multiple publishers pulling out of the E3 showfloor proper and holding their own events, it makes sense that Nintendo would ramp down even more than they have in recent years. But this ramp is basically a nub at this point.
Nintendo has re-iterated that yes, the new Zelda is basically the only thing they're showing at E3, even going so far as to stream it all day, which you can watch here on June 14 at 9AM PT. The publisher promises this is the "world's first in-depth look at the game," and states that Zelda is their only playable title at E3. There's also a contest to attend the event if you're interested.
And uh. That's....about it. Nintendo is really banking on Zelda and the NX, both of which won't launch until 2017.