CNN won't replace Larry King when he retires
But according to Michael Starr of The New York Post, whatever show that will take Larry's place when he finally calls it a career probably won't have the same format. Starr reports that CNN executive Jim Walton told the Atlanta Journal-Constitution that "It's probably very unlikely that when Larry does retire that we would replace him." This means no Diane Sawyer, not Ryan Seacrest, no Bob Costas all proving that they're better interviewers than King.
I'd imagine the format of the show is a little too slow-paced for the "new" CNN, and, despite the show's still-good ratings, they'll look to do something close to what Anderson Cooper is doing than what Larry did. In fact, they'll probably just slide AC 360 into that time slot and try something else at 10. That would make the most sense, don't you think?