Katie Couric and ABC television are on the verge of signing a $20 million deal, which would give Katie her own talk show, as well as significant involvement in ABC News -- and the big casualty could be "General Hospital." ABC would also give Katie a 1-hour, 5-day-a-week syndicated talk show, that would begin in September, 2012. Our sources say ... one option ABC is considering is giving its affiliates back the hour where "General Hospital" airs to make room for Katie. In other words, ABC would axe the third longest-running soap in history and the last one standing on...