WDWMagic.com is reporting that Disney has filed additional permits for work inside Star Wars: Galaxy's Edge. The first permit (filed October 13th) is for Ride Installation at 384 Cypress Drive. This is believed to be the address for the Battle Attraction (Project Alcatraz). The permit cites numerous partners including The White-Turner Contracting Company who have previously worked with Walt Disney Imagineering.
An additional permit was filed today with a description of "Exterior Architectural Ornamentation and Scenic Elements". This indicates that theming details could soon be underway at the same location.
Both permits expire September 26, 2019, pointing to a late 2019 opening for Star Wars: Galaxy's Edge.