As Insectoid said, this game had been in development for quite a while. I don't know..haven't heard much about it. But MJ did have a lot of good song, and no one can doubt that he led a very colorful life. Why don't you just wait till more is known, then make a judgment? It's a win-win that way. If it turns out well, awesome. If not, it's not like you have to waste money on it.
And I don't get this thing about making money off of the dead. Hello, Hitler? Anything World War 1 or 2? How about all those other wars? Pirates? Gangsters? Just because you may not know their name, or they are not known for positive contribution to the world doesn't make it any better.