K.O. “Mortal Kombat II” fought its way to the top of the box office on its opening day. The fantasy film, a sequel to the 2021 original, raked in $17 million Friday, according to Box Office Mojo . The Post called the film — the fourth installment in the franchise based on the popular video game — “an onscreen bucket of slop” and “a migraine of nonstop fights and idiot characters.” Adeline Rudolph plays Princess Kitana in “Mortal Kombat II.” Warner Bros. Pictures However, it still managed to step right over “The Devil Wears Prada 2,” which moved down a notch to second, with $9.8 million in sales on its second Friday in theaters. The sequel to the 2006 comedy — in which stars Meryl Streep, Anne Hathaway and Emily Blunt all reportedly earned $12.5 million to reprise their roles — enjoyed the third-best domestic debut of the year. In third was the Michael Jackson biopic, “Michael,” which earned $8.8 million on its third Friday in theaters. Want more celebrity and pop culture news?…