Katherine Jackson has a limp from polio, yet in the movie she walks perfectly.
Jehovah's Witnesses do not believe that the only people who will be saved after Armageddon are the 144,000 that will go to heaven. They believe that the rest of the people who God spares will live forever on a cleansed paradise Earth. Michael's family would not have referred to themselves and their loved ones as part of the 144,000.
Jehovah's Witnesses also do not refer to their place of worship as a church. The call it a Kingdom Hall.
Actually, for tax purposes, they call it a Church.
The cast credits at the end of the film list Jeff Scott as having played the Stage Manager. In reality, Scott was unable to fulfill the requirements of the role, and Trainee Assistant Director Troy Rudolph was chosen to replace him at the last minute.