Not sure when this presentation took place, but it’s fairly recent. The document below gives updated timelines for new construction projects for film/arts/PAC/science facilities.
Of particular interest to DS, the projected completion for construction of film phase 3 is the end of a Summer 2021 (assuming funding is met). The plans contain a film production studio.
https://wesfiles.wesleyan.edu/departments/majormaint/MM%20FY19/SlideConstruction.pdf