Bollywood star Rani Mukherji-led film Mrs Chatterjee Vs Norway is set to release theatrically next year on May 20, the makers announced on Tuesday.Billed as an untold story about a journey of a mothers battle against an entire country, the movie is based on a true incident that rocked children and human rights at an international level.The film is produced by Monisha Advani, Madhu Bhojwani and Nikkhil Advanis Emmay Entertainment and Zee Studios.