We know the whitewash movie they've done the past couple years.
I can see one being done w/ the truth facts. Showing Russell and the pyrmaid stuff. Showing his wishes and how the organization would be run, then showing Rutherford how he took it over by force and unethical means and kicked the others out. Using all words and quotes from the actual historical papers we have so that anybody researching the movie will find nothing exaggerated. Then showing how he tried to escape going to jail and ripping up and stopping the books w/ the government's complaint was about sedition, about the gravestone built and dedicated to Russell, also during these times the predictions and talks about those dying, then in WW2 about him trying to sweet talk hitler and show support for hitlers values.
There is SOOOO MUCH, a movie the same style as the WT whitewash movie, but with the real facts, and perhaps prompts w/ the sources throughout it, will give the best witness about the truth. Part 2 of it would go through teh years w/ Ray Franz, what happened to him, and how all these WT's policies were changed, etc.
The movie would have 100% truth, nothing exaggerated, and sources for everything in it for people to look up.