On May 15, the Arizona Supreme Court voted 6-1 to deny any petitioning relief for statewide initiatives. See this story. The Court has not yet explained its reasoning.
The only hope for Arizona initiatives this year now rest in the Ninth circuit, in the lawsuit Arizonans for Fair Elections v Hobbs, 20-15719. That lawsuit has a telephone hearing Wednesday, May 20, at 9 a.m.