This weekend, “Wicked” lights up cinema screens across the country and around the world, joining “Mamma Mia!” and “Chicago” and “Hairspray” among Broadway musicals and “A Few Good Men,” “The Odd Couple,” “Arsenic and Old Lace” and (let us newspaper people not forget) “The Front Page” among straight plays that found big-screen success. And though it’s early yet, the smart money says the “Wizard of Oz” prequel will make hundreds of millions of dollars.