Open Road Films has set a May 19, 2017 U.S. release date for The Nut Job 2, a sequel to its 2014 sneaky animated hit that grossed $120.9M worldwide. That pic marked the biggest box office opening ever for an independent animated film. Will Arnett, Katherine Heigl, Maya Rudolph, Gabriel Iglesias and Jeff Dunham are reprising their voice roles for the follow-up, with more cast coming soon. The sequel returns to Oakton, where the evil mayor decides to bulldoze Liberty Park…