The entire film was shot with the same cameras unlike his previous films, so I don't see any reason that it shouldn't be in a fixed aspect ratio. Which ratio it will be in though is the question since he released it in several different aspects depending on the venue.Is it special pricing for Pre-order vs. regular release date? Will it go up to $29.99 or $34.99 as we get closer to release?
Also, with Nolan doing the variable aspect ratio on previous releases on BD. So, the question is, will this be in constant 1.78:1.
"The upcoming 4K Ultra HD Blu-ray release of Christopher Nolan's The Odyssey is reported to feature a fixed 1.78:1 aspect ratio rather than a variable aspect ratio (VAR) that shifts between different frames. [1, 2]"