"Thriller" was a moment in history where one album literally connected with everyone in the world. They said something like 1 and every 10 people have heard or own Thriller in the world. That's insane. "Thriller" is to music what the Bible is to books, that's how many people owned it. But "Bad" still did over 40 Million Worldwide which is still a lot of damn records. It had more
#1 hits but "Thriller" was just unique. Here are the Top 5 Selling LP's ever:
#1 . Michael Jackson - Thriller - 110 Million
#2 . AC/DC - Back in Black - 50 Million
#3 . Pink Floyd - The Wall - 50 Million
#4 . Whitney Houston - The Bodyguard - 45 Million
#5 . Michael Jackson - Bad - 45 Million
So It dropped 60% in sales from "Thriller", he still put up Top 5 Numbers all time on the follow up so I think he succeeded anyway. But don't get it twisted, Bad was still huge. The "BAD" tour was bigger than his Tours during the Thriller Era. Bad Michael was the Apex of his popularity, he basically was the undisputed King by the time the Bad Era ended. It was not debatable who the King of the 80's was.