It probably won't go beyond the 1980s. A sequel is planned though. Tagline in that poster is "His story begins". I think this will definitely address the plastic surgery because it started after Thriller. I do agree that his looks changed a lot over the years but that hairstyle was a big reason why he looked so different in the 2000s. He started to look more like himself again after brining the old hairstyle back in 2009.