Deadpool was the #1 film in every country except one - Poland - where it settled for second place behind Planeta Singli (Planet Single) - written by Attackships creatives Sam Akina and Jules Jones, and directed by Mitja Okorn. Planet Single was in its second weekend of release and experienced a 150% boost in attendance over the holiday weekend bolstered by positive word of mouth and near unanimous critical praise.
Check out some articles on the film here and here. Planet Single is the second film written by Sam Akina and Jules Jones and directed by Mitja Okorn that has been a blockbuster success in Poland. The first film, Letters to Santa (Listy do M.) is one of Poland's highest grossing films of all time.