By late 2019 Hollywood Studios will have Toy Story Land, Galaxy’s Edge, and the Mickey coaster open. Has there been any discussion about park hours being extended to a schedule more like Magic Kingdom’s hours?
Well for Toy Story Land's opening weeks (months?) looks like DHS is opening at 8 versus 9, staying open till 10:30, with early morning EMHs every day as well a once a week evening EMHs to 12:30. I'd guess they'd do the same thing when SW Land opens and use info from those openings to determine if the hours need to be adjusted, if so to what, and whether it's time to institute regular hard ticket "after hours" events.