Universal has not been forthcoming with other COVID-19 safety details for HHN, even amid a surge in hospitalizations in Central Florida.
The Terror Tram will make its return this year, themed after the "Purge" franchise.
HHN Icons: Captured will star Jack the Clown, Chance, and other past icons created for Universal Orlando's Halloween event.
The 1973 film was last featured in both Orlando and Hollywood at HHN events in 2016.
It's the first HHN house based around "Texas Chainsaw Massacre" since 2016.
Mazes based on the series will be featured at HHN in both Orlando and Hollywood.
Universal Orlando said the HHN icon's "ominous and unrelenting presence will infiltrate every aspect of the event."
SeaWorld's first adult-oriented Halloween event will run for 27 nights starting Sept. 10.