NEW YORK With a combined $270 million in worldwide ticket sales, “Wicked” and “Gladiator II” breathed fresh life into a box office that has struggled lately, leading to one of the busiest moviegoing weekends of the year. Jon M. Chu’s lavish big-budget musical “ Wicked ,” starring Ariana Grande and Cynthia Erivo, debuted with $114 million domestically and $164.2 million globally for Universal Pictures, according to studio estimates on Nov. 24. That made it the third-biggest opening weekend of