They ran a screening of most scenes from the movie. It was not a final cut. Studios always test screen the major plot points and leave out the filler so a 2 hour movie gets a 45 minute test screening. Google “test screenings of movies” to learn how it’s done.
OverlordDVD on
YouTube has the details. MAJOR SPOILERS in that video!
But maybe you’re right. Maybe Disney will release the movie WITHOUT having done any test screenings. Maybe the reshoots were done just for fun and NOT as a result of the test screenings. Yep, sounds plausible