To some extent. The movie takes inspiration from the events and persona of Al Capone but may have fictionalized certain aspects for dramatic effect and entertainment purposes.
Well, it's significant because it might bring to light aspects of Al Capone's life that are not widely known. By basing it on a true story, it can add authenticity and depth. Maybe it shows his rise, his power, and his downfall in a more vivid and real - life - like way compared to fictionalized accounts that have no basis in fact.
It's likely about Al Capone. Maybe it details his life as a notorious gangster in a graphic novel format. It could show his rise in the criminal underworld, his illegal activities like bootlegging during Prohibition, and his influence in Chicago.