This is the classic Big fish eats little fish story. Yes, Sony is a multi-billion dollar industry, but so is the National Football league, more multiples of billions. And that would be a legal battle that doesn’t need to happen.
“While Sony and Concussion director Peter Landesman deny the film was edited to prevent NFL protests, the differences between the script as originally prepared for production and how it ended up on screen strongly suggest otherwise.” -Reported by Timothy Burke
More on this here: How Sony Changed Concussion To Make The NFL (Or Their Lawyers) Happy