There is a Princess Diana musical currently in the works and will be out in 2019! The musical will tell the story of Princess Diana's life taking place in 1981 when Diana married Prince Charles and joined the Royal Family through her relationship with him to his affair and ultimately her death. A lot of people are very interested in her life so it will get the attention that and interest it needs but there isn't much details about the project as of yet. It could end up being incredible or really bad but we hope it turns out to something that Diana would have approved of!
There is also a Michael Jackson musical in the works as well that his estate is working on with the production company so that resembles something Michael would have approved of. It will drop in 2019 as well.