With Diane Sawyer set to replace Charlie Gibson on World News in January, her old show, Good Morning America, will be rudderless without, as one staffer called her, its "supernova." The New York Times reports that Good Morning America is still the major moneymaker for ABC News, although it's finished second behind NBC's Today Show for more than a decade. Still, tens of millions of dollars are riding on Sawyer's replacement. ABC will conduct a broad search to find Sawyer's replacement. Possible replacements include 20/20 co-anchor Elizabeth Vargas, NBC host Campbell Brown, and Natalie Morales and Amy Robach of CBS’s The Early Show, although none of them have quite the wattage of Sawyer.