Ya know, if they're going to wait this long, they should just do something else instead. I would be totally fine with DA not coming at all. I don't want to wait six years for a clone of a "meh" coasterlator ride that's already been open since 2014.
Lets be honest, USH needs more rides, DA is very nice, Gringotts has an amazing queue, but USH does not need this ride. We need another thril ride, but not one that's in 3D.
Escape from Gringotts is a good ride, but the pace was kinda slow for my liking and it was far too reliant on screens. They should do something else with Potter and let Orlando keep DA.