When an album becomes a success, the artist might release a sequel of it. Back then, Meat Loaf did so by which he even released a trilogy from different decades. His first one was in 1970s, then 1990s, and the last one was in 2000s. It might be a good idea to follow the success of the first one, but the subsequent parts may not be as huge.
Eminem did it as well with his 2000 album "The Marshall Mathers LP". He had success on "The Slim Shady LP", but "Marshall LP" made him a bigger star. In fact, it remains his biggest selling album. That song produced the global hit "The Real Slim Shady" but "Stan" became iconic that the word "stan" is currently universally used by fandoms.
Thirteen years later, he released "The Marshall Mathers LP 2", the sequel of his second mainstream album. Of course, it was also a big hit like the number 1 hit "The Monster", his second collaboration with Rihanna. It shows that the two artists had chemistry on "Love the Way You Lie", and their second collaboration was also a hit.
Eminem doesn't have to record a sequel of his album because he always go to number 1 whenever he releases an album. But it can be a tribute for his biggest selling album. "Marshall LP 2" might not be as huge but it was still successful scoring some hits.