It’s gonna be a long, long time until the Elton John musical biopic “Rocketman” comes out. But Paramount Pictures is whetting fans’ appetites already, releasing a photo early Friday of actor Taron Egerton fully transformed into the pop icon. Jamie Bell and Bryce Dallas Howard also star in the film, directed by Dexter Fletcher (who took over as director for the Queen movie “Bohemian Rhapsody.