The movie is not told by walking to various unreliable witnesses. The second protagonist, Dr. Eileen Flax (Lesley-Anne Down) just gets the pieces of the visions, as if this was some sort of Edgar Wright film.
When looking at the poster of 2002 film Rollerball you ask yourself 2 questions: 1) Why somebody thought it would be a good idea? 2 ) Why this somebody is John McTiernan, the filmmaker that brought us classics like Predator and Die Hard?