no you are wrong, it was clearly said the characters are canon so stop throwing your random sht.
Check the OP wiki
https://onepiece.fandom.com/wiki/One_Piece_Film:_Gold
Who is the writer?
Read this interview to know more about the writer
http://www.onepiecepodcast.com/2016...d-interview-hiroaki-miyamoto-tsutomu-kuroiwa/
Now show me a credible source where it says Douglas Bullet is canon