By Brian Stelter, CNN

I think it's safe to say that CNN couldn't have picked a better week to introduce a new host on "Reliable Sources!"

I'm Brian Stelter, CNN's Senior Media Correspondent, and I'm busy getting ready for my debut. "Reliable Sources" is one of a kind - a weekly opportunity to analyze the changing media world. It's an honor to be taking the helm.

With the world mourning the death of former South African President Nelson Mandela this week, we'll have an in-depth look at the global media coverage and how it is shaping Mandela's enduring legacy. The New York Times' Bill Keller, author of “Tree Shaker: The Story of Nelson Mandela,” will tell me about his 2007 interview with Mandela, portions of which were published for the first time on Thursday.

We –the top-notch "Reliable" team of producers and I in Washington - have been working all week on a bevy of other segments. From Martin Bashir’s resignation at MSNBC to Amazon CEO Jeff Bezos announcing his plans for drone delivery on "60 Minutes," we'll tackle the media highs and lows of the week with American University’s Jane Hall, The Washington Post’s Paul Farhi & NPR’s Eric Deggans.

We're reserving one segment for a conversation about coverage of the one-year anniversary of the Sandy Hook Elementary School massacre. We wanted to know how news organizations around Newtown, Connecticut, where the shooting happened, are approaching the ethical issues that the anniversary presents for journalists — for example, whether to publish the 911 tapes that were made public earlier this week. Brian Koonz, who lives in Newtown and is the metro editor for a set of local newspapers owned by Hearst, will join us.

And in an exclusive interview with CNN, a media star who needs no introduction: Ryan Seacrest.  I shot the interview late Friday evening in Los Angeles and I was surprised by several of his answers about "American Idol," the "Today" show and the juggling act of his career.

Since we're nearing the end of the year, I'll also reveal the person who 'I Want Media' readers have voted as the media person of the year.

See you in a few hours! "Reliable Sources" starts at 11 a.m. Eastern time Sunday.

–Brian