First, I should confirm what the original aspect ratios of the movie were. "Oblivion" was filmed with a 2.39:1 aspect ratio but was shown in a 1.88:1 open matte format in some theaters to hide the black bars when shown on a 1.85:1 screen. This means some directors choose to crop the sides slightly for a 1.85:1 aspect ratio but leave the image open at the top and bottom so the image doesn't look squished on standard screens. However, for Blu-rays, especially those labeled as "open matte", the image might show the full 2.39:1 if not forced into a specific ratio. But the term "hybrid" here could mean that the release has multiple options or that it's an original aspect ratio preserved.