"The legal battles of the great American boxer against being conscripted into the US military during the Vietnam War."
Maybe my reading comprehension has failed, but I am given the impression from reading that description the major basis for this movie would be about Ali and his fight against his draft status and the Vietnam war.
As a atheist/agnostic I find this incredibly deceiving. Instead of the focus of the film being about historic legal battle(s) that went all the way to the US Supreme Court, it is a focus of religious beliefs and specifically the Nation of Islam. For me legal battle was more impactful to my life and thousands if not millions of others than anthing else Ali did including his boxing career. Ali's religious beliefs are not because I find religious debate and Islam bashing by the right wing horrible and just another form of racism similar to anti-immigration.
Note the Director of this film Bill Siegel is very anti-Islamic has even wrote a book talking about radical Islam and how it is destroying/destroyed America! "The Control Factor: Our Struggle to See the True Threat"
I suggest you not watch this film and instead watch many other better documentaries about Ali. Even Will Smiths portrayal in Ali is better. To me this whole film was made because Ali said many things that were hurtful to non-blacks in a very hard and historic time in our nations history. Now since Ali said those things and is a historic figure in Islam this is a way to bash Islam without bashing Islam. Now it's hard for me to fault Ali for saying the things he said because at the time blacks were not treated as equals and thus still had a lot to fight for and Ali was the epitome of this. Shame on you Bill Siegel!