Official WONDER PARK Trailer Enjoy the official WONDER PARK trailer! The film, co-written by Josh Appelbaum and André Nemec, stars the voice talents of Brianna Denski, Jennifer Garner, Ken Hudson Campbell, Kenan Thompson, Mila Kunis, John Oliver, Ken Jeong, Matthew Broderick, Kath Soucie, and Norbert Leo Butz. WONDER PARK will be released in theaters on March 15, 2019. June, an optimistic, imaginative girl, discovers an incredible amusement park called Wonderland hidden in the woods. The park is full of fantastical rides and talking, funny animals – only the park is in disarray. June soon discovers the park came from her imagination and she’s the only one who can fix it, so she bands together with the animals to save this magical place and bring back the wonder in Wonderland.