Description & Facts: Stay tuned for interviews from the cast with Zach, Corbin, Vanessa, Ashley and more.... 'Back Into the Game' With 'High School Musical 3' Director Kenny Ortega Revived Hollywood Musicals and His Career By CHRIS CONNELLY and BONNIE MCLEAN Oct. 18, 2008— How can you tell a movie musical is likely to be a major hit? When, a month before it opens, its director is already working on a sing-along version. At the age of 58, Kenny Ortega, who choreographed "Dirty Dancing" and brought "Newsies" to theaters, is putting the finishing touches on the third installment of his hit franchise, "High School Musical 3: Senior Year" -- the first "High School Musical" to be debuting on the big screen. "You know, it's the strangest feeling," he said. "I'm not ready to let it go [laughs]. You know it's like sending your kid out there to go to school for the first time, having these questions: 'Is it ready?' 'Is it finished?' 'Is it pretty enough?'" 'We Knew Something Was Happening' No one else seems very concerned, especially the millions of devoted tweens who've been counting down the days until the Oct. 24 debut of "High School Musical 3." These fans have spent the last 33 months turning a Disney Channel musical romance about a jock and a math whiz into a huge franchise for Disney, the parent company of ABC News. Its overwhelming success was anticipated by few -- except Kenny Ortega. "We knew something was happening," said Ortega. "Before we walked out of 'High School Musical One' we were in