The description on JB Hi-Fi has been updated to be '2 4K Ultra HD/Blu-Ray', which seems to indicate that we'll be getting the Theatrical and Extended cuts in this release, same as the UK version. Not confirmed, but seems likely.
Updated with release date, confirmed artwork and that it includes the 2 4K discs with the extended and theatrical cuts! I've now cancelled my UK order from Amazon for this.
Just received my copy from JB Hi-Fi. Looks to be the same as the UK version with the flat metal background. I prefer the US version, but not enough to upgrade.