I'm confident we'll get a third Happy Death Day movie at some point. Franchise star Jessica Rothe is still championing the trilogy.
“So, Chris Landon and I have actually broken the whole story, which was really fun,” she said. “We went to an undisclosed location—a Le Pain Quotidien in between our houses—and sat there for hours and broke the third movie. And now, we’re just waiting for Universal and Blumhouse to [give us] just a little money. … This is a Deadline exclusive. You heard it here first.”
Source: Deadline