This lines up with what I've heard. A Great Hall addition will not interfere with the land's ability to add another ride/attraction later as well...
Also, the Epic Universe land was originally designed with a Great Hall dining experience in the plans as late as 2018, but it was cut before the park was announced... So, strangely, this "Paris" land has always been planned to be a hodgepodge of things they couldn't fit in Hogsmeade and Diagon.