I don't want a biopic. For one, it would have to be a series as a standard 2-3 hour film is simply not enough to capture MJ's ~40-45 year career. In addition, we have the issue of MJ's appearance changing drastically through the 80s/90s (both as a result of a vitiligo and plastic surgery) so there would need to be a potential for multiple actors. His face, especially post-surgery, is very distinctive imo and it's hard enough finding someone who looks like Michael, who can also act decently in addition to being able to perform like MJ.
And I've never seen anyone dance like MJ and it would just throw me off seeing some actor dance at a fraction of the level MJ could. A good voice impersonator would be needed as well, if they don't look like Michael they could dub the physical actor's voice over... though that could create more hardships in post-production. Certainly not impossible, but depending on factors it does jack the cost and time up.
I remember there was an Elvis biopic they made (This is Elvis I think it was called). Alright doco, they merged actual live footage of Elvis with that of an actor and I remember in general finding it difficult to differentiate between the real Elvis and the fake Elvis at times... although I remember sometimes I was distracted from the film by that fact. Sometimes I'd be watching a scene and wondering if it was actually from the 1950s or if it was shot specifically for the doco and usually I could tell from a number of factors, but I was thinking about that often rather than taking in it like I should've.
Then you have the issue of facts. No doubt one of the things I see argued and debated about most in the MJ community is how legitimate claims are about Michael and whether things happened or not, how they went down etc. I can easily see the biopic doing something that would cause the MJ community to get into debates about whether something really happened that way or not, and there would honestly be some slight changes as to what actually happened for drama reasons.
So no, I don't really want a biopic. I'm always down for documentaries but especially when it comes to Michael Jackson, a biopic would be extremely hard to pull off at the level that Michael would deserve. IF they are going to do one, I'd rather it focus on one time/conflict of Michael's life, not his whole life.