Shrek 4D's closure was confirmed by the park, announced for January 10th, 2022. Replacement is said to be a walkthrough with interactive elements, which may be temporary attraction. The Mummy is closed Jan 7th through mid-Summer to get a refurbishment. No word on any enhancements or changes yet.
The Fear Factor Live show has not returned to the park, and once HHN is over on October 31st, there is a strong rumor that the building will be torn down for a VR attraction as an expansion to Diagon Alley. This was originally intended to go to Epic Universe, but there have been no confirmations yet.