DisneyWorld.com states on the official pages for Tiffins and Nomad Lounge that both restaurants will open on April 22, 2016.
Tiffins will be a signature restaurant (table service) with a menu that draws from "places that inspired the creation of Disney's Animal Kingdom." It will be open for lunch and dinner and include waterfront views as well as indoor and outdoor seating.
Next to Tiffins will be the new lounge called Nomad Lounge & Cocktail Bar. The lounge will offer small plates from around the world.
Both locations are currently under construction behind Pizzafari. Our rumor tracker can be found here.