The first box office numbers are in for Godzilla, and it's surprised the industry with a $38.5 million in the US on opening day — the largest of the year so far. To celebrate, sources have confirmed to Deadline that a sequel to the film is already in the works. Naturally, there are no details available on the sequel, but it shouldn't come as a particular surprise that Warner Bros. and Legendary Pictures would seek to turn Godzilla into a franchise. Across the board, sequels are one of the easiest ways for the movie industry to guarantee huge returns. Godzilla's expected to rake in $93.2 million domestically over this weekend, which would place it just behind Captain America: The Winter Soldier for best opening weekend of 2014.