It's unclear which specific "last demon movie" you are referring to, as there have been many films throughout history featuring demons as a central theme or character. However, I can provide some information on recent demon-themed movies.
One recent demon movie that gained popularity is "The Conjuring: The Devil Made Me Do It," which was released in 2021. It's the third installment in "The Conjuring" franchise and based on a real-life court case in which a man claimed to have been possessed by a demon when he committed murder. The film follows paranormal investigators Ed and Lorraine Warren as they try to help the accused man and uncover the truth behind the demonic presence.
Another demon movie that came out in 2021 is "The Unholy," based on the novel "Shrine" by James Herbert. The story follows a young deaf girl who is suddenly able to hear after an encounter with a supposed apparition of the Virgin Mary. However, as her miraculous abilities draw more and more people to her small town, it becomes clear that there may be a more sinister force at work.
Both of these movies feature demons as a central part of their plot, and both were met with mixed reviews from critics and audiences.