Oprah only announced her impending retirement on Friday, and speculation on who will replace her atop the talk-show universe her has already begun. The Times pegs Ellen and Dr. Oz as the front runners, partially because their deals come up for renewal at the same time that Oprah plans to step down. Martha Stewart, Tyra and Bonnie Hunt could also reap some rewards from a talk-show landscape that doesn't include Oprah. But the darkest horse of them all is Katie Couric, who, the Times says, "has long been mentioned as a possible syndicated star." As long as they find someone who can yell out Daniel Day-Lewis half as well as Oprah, we'll be satisfied.