Lara Logan: And so how much is that worth today?
John Branca: I -- I wouldn't want to speculate about what it's worth, but it --
Lara Logan: Come on, John. You didn't --
John Branca: It's --
Lara Logan: You didn't make all this money in this town without knowing what your investments are worth.
John Branca: Well, it would be speculation at this point.
Lara Logan: It's estimated to be worth, like, a billion dollars.
John Branca: Michael's half?
Lara Logan: Yes.
John Branca: Well, you know, you never really know what something's worth until you go to sell it. And we are not sellers. We are not gonna sell any assets.
At the time of his death Michael Jackson had borrowed $380 million against the value of the songs he owned. So the estate had to move quickly to avoid losing the songs to creditors.
John Branca sold future music rights to Sony for a reported $250 million. It was the biggest record deal in history.
Branca's team also combed through personal video shot during rehearsals for a comeback tour Jackson was preparing for right before his death. The footage showed the talent Michael Jackson still possessed as a singer, dancer and entertainer, then 50 years old.
It was made into a movie, called "This Is It" and was released within months of Michael Jackson's death. So far it's made over $500 million.
Zack O'Malley Greenburg: A lot of companies got on board with Michael Jackson once they saw the success of "This Is It" and once they saw, you know, Sony investing a quarter of billion dollars for that record deal. You know, then you see Pepsi coming back and doing an endorsement with him. You see Cirque du Soleil coming in and doing a show. You know, I think that those first couple deals proved that Michael Jackson was no longer radioactive.
Lara Logan: So, death erased all his sins or even possible sins or suggestion of sins?
Zack O'Malley Greenburg: I think his death caused people to remember him as he was in the Thriller years. You started to hear Billy Jean and Beat It and Thriller on the radio all the time, I think that that transported people back to the mid-'80s when Michael Jackson was at the peak of his career.
That's what the Jackson estate and Cirque du Soleil gambled on. Michael Jackson's 1983 Thriller video helped the Thriller album become largest selling ever. It had seven hit songs on it.
His music drives the touring Cirque du Soleil production. Jackson's estate and Cirque du Soleil are 50/50 partners. And while this show is expected to continue touring for years, a new production opened this summer in Las Vegas. It's called Michael Jackson: One. And we were allowed in to watch one the final rehearsals.
This show features more of classic Michael Jackson choreography, and more of Cirque du Soleil's signature acrobatic production created by founder Guy Laliberte.
Lara Logan: Do people come here to see Michael Jackson? Or are they coming to see something else?
Guy Laliberte: I think people are coming here -- yes, because they're passionate about Michael. So it's very tricky because you're touching an iconic figure. And we have to be careful. Because the base fans they are very, very difficult and demanding.