The time setting of the movie was also different since it is set in 2020 Asia compared to the anime which is set in 19th century England. Based on my research the main reason for changing the time frame and setting is because of the producer, Shinjo Matsuhashi having problems casting Japanese actors for the film.
In the movie adaptation, "Black Butler" is set in the year 2020, this is a 130-years leap after the events of the manga and anime. The movie brings in a brand new adventure of Sebastian returning to assist a descendant of the Phantomhive family. Sebastian's new master is Kiyoharu,the young leader of the Genpo Group, whose real name is Shiori because she disguised herself as a man to protect her status as heir to their family's estate. Bound together by an unbreakable master-servant loyalty, Shiori traded her sould for Sebastian's service. Both of them carry out secret missions from the Queen. When they are assigned to look into an ongoing serial murder case, Sebastian soon discovers a world that humans should never enter. - SM Cinema.
Movie Quality of Black Butler
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