Mamma Mia! 3 could be on the cards, as speculation around a third movie in the ABBA-themed musical romcom from Universal Studios has been ongoing for years. The third installment in the franchise would come after Sophie (Amanda Seyfried) grapples with the death of Donna (Meryl Streep), the hotel's future, and her own growing family in Mamma Mia! Here We Go Again. The ending of the second movie left the need for a sequel with many viewers, and demand for Mamma Mia! 3 has been near-continuous since it arrived.

https://screenrant.com/mamma-mia-3-release-date-story-updates/