Looks like Nintendo will not be coming to PAX East this year.
The news was confirmed by Nintendo World Report. The site posted this statement they received from Nintendo.
"Interacting directly with our fans and letting them play our games firsthand is a key component of our approach. That doesn’t include PAX East this year, but we will offer our fans a variety of opportunities to get their hands on Nintendo products in 2014. Keep an eye on our social media pages for more information about where we’ll be and what you can play."