And now there are five movies opening wide the weekend before Easter. Relativity has shifted Oculus from April 18 — where it slotted the horror pic only a month ago — to April 11, adding to an already-crowded frame. The Blumhouse film starring Karen Gillan, Brenton Thwaites, Rory Cochrane and Katee Sackhoff now will open against Fox’s toon sequel Rio 2, Lionsgate’s Kevin Costner football drama Draft Day, Open Road’s Arnold Schwarzenegger actioner Sabotage and the Weinstein Company’s Bill Murray pic St. Vincent De Van Nuys. Mike Flanagan directs Oculus, about a pair of grown siblings who set out to expose and destroy the haunted mirror they believe was responsible for their parents’ murder a decade earlier. Flanagan and Jeff Howard wrote the script. The film was developed and produced by Intrepid Pictures, which co-financed with MICA Entertainment.