Mahou Shoujo Madoka Magica, also known as Puella Magi Madoka Magica, is a Japanese anime television series created by Studio SHAFT. The story follows a group of girls who are offered the opportunity to become magical girls in exchange for granting one wish, however, they soon learn that there is a much darker side to being a magical girl.
The anime series was first aired in 2011 and it was followed by 3 movies in 2012 and 2013 . The movies were labeled as “rebellion story” and it serves as a sequel to the TV series.
As of my knowledge cutoff, there is no official confirmation of a fourth movie of the series, titled “Mahou Shoujo Madoka★Magica Movie 4: Walpurgis no Kaiten”. The decision to produce a new movie typically depends on the popularity and financial performance of the series, as well as the availability of source material. It’s best to wait for official announcements from the creators or the production company regarding a new Mahou Shoujo Madoka Magica movie.