Harry Potter Film Reboot

Please tell me your thoughts on this idea, I really don't know if it would work, constructive criticism i always more than welcome.

Basic Layout of Each Film
Every movie would be atleast two and a half hours long, and not every detail from the books would be covered, but many more small details would be included. No new content would necessarily be added, but nothing would be twisted from the books into film.

Plot
An orphan's parents who died when he was a baby from a mysterious figure, Harry Potter has a scar on his head shaped like a lightning bolt and he is raised by a cruel aunt and uncle. When he is accepted into a magic school and learning his parents' legacy of magic lived on, he goes to Hogwarts, later meeting Ron Weasley and Hermione Granger as his best friends along with other people.