As of now, "Happy Death Day 3" has not been officially confirmed or canceled. Director Christopher Landon has expressed interest in making a third installment, but there have been no concrete plans or announcements regarding its production. Following the release of "Happy Death Day 2U" in 2019, the film did not perform as well at the box office compared to its predecessor, which has contributed to uncertainty about a potential sequel. Fans remain hopeful, but the future of the franchise is currently unclear.

In "Happy Death Day 2U," the killer is revealed to be Ryan, one of the main characters, who becomes a host for the antagonist known as the "Gloomy Face" after a science experiment goes wrong. The film explores the concept of alternate timelines and the consequences of their actions, leading to a complex narrative where the characters must confront this new threat while navigating the time loop. Ryan's transformation into the killer adds a twist to the story, blending horror with elements of science fiction and comedy.

"Happy Death Day" and "Happy Death Day 2U" are both horror-comedy films but differ in plot and themes. The first film follows college student Tree Gelbman, who must relive the day of her murder repeatedly until she discovers her killer's identity. The sequel expands on the concept of time loops and explores alternate realities, introducing new characters and deeper sci-fi elements. While the first film focuses on self-discovery and confronting fears, the sequel emphasizes friendship, sacrifice, and the consequences of time manipulation.

"Happy Death Day 2U" is worth watching if you enjoyed the first film, as it expands on the original's premise with a blend of horror, comedy, and science fiction. The sequel follows protagonist Tree Gelbman as she faces a new time loop, this time involving her friends and a more complex plot. It offers a mix of humor and emotional depth, exploring themes of friendship and sacrifice. While some viewers may find it less impactful than the first, it effectively combines genres and provides entertaining twists that fans of the original may appreciate.