I don't know what movie 'Broken Blade' is. However, based on my knowledge of web novels, I can tell you about some movies similar to 'The Broken Swordsman.'
Some web novels were adapted into movies such as Battle Through the Heavens and Martial Universe. These movies are based on the original works and may be different from the original works, but they are still loved by the fans of the original works.
There were also some other movies such as " Sword Net 3,"" Full Time Expert,"" A Smile Is Beautiful," and so on that were adapted from web novels. The storyline and character settings of these movies were different from the original works, but they were still loved by the audience.
Definitely not. Broken Arrow is a work of fiction. The story and characters were invented for the purpose of entertainment and not drawn from real-life occurrences.
The movie Broken Hill has some basis in reality. While it might not be a verbatim account of a specific true story, it incorporates themes and scenarios that could have occurred in real life.