Why can't they tell his story through to the end? I get that there are some unpleasant (to say the least) things that happened from 1993 on but his life and his career didn't end there and he certainly had some good things happen as well.
Constantly trying to erase the last 15 years of his life is disingenuous and once again, leaves the project open to major criticism. The same criticism that everyone spouts about MJ the Musical - it doesn't address the allegations and tries to whitewash his life.
I don't know if it's true that they will leave out the allegations now or if the movie will end in 1992 or 1993 but not telling his full story is not the best way to go, imho.