I will be honest without spoilers that there is no mystery in it which should be the point of Detective Conan movie but DC fans will love it anyways. Fully action focused the movie is like a Detective Conan version of Avengers where everyone is involved like FBI, CIA, japanese police, Public security and Black Organization (except Hattori and Kaito Kid) which was so fun that I rewatched it just afterwards. It is not going to develop the main plot in anyway and feels a bit distorting the main series as well but still is a must watch for DC fans. Obviously our boy Kudou shines here as always but this time takes help from people which was a first. Go for it.