https://wccftech.com/galaxy-note-9-camera-orientation-undecided/

Apparently, Samsung still hasn’t made up its mind regarding the orientation of the Galaxy Note 9’s dual cameras, though 360-degree renders earlier reported by us reveal that this alignment is going to be horizontal rather than the vertical setup used on the Galaxy S9 Plus. A new rumor originating from China claims that ultimately the decision about the orientation of the cameras will depend on the battery size.

If the battery size is smaller, Samsung would go for a vertical camera orientation. So far, there are rumors coming in all directions stating that the Galaxy Note 9 will feature a 4,000mAh battery, so that might conclude to an extent that the upcoming flagship will sport a dual-camera in a horizontal position. However, if you remember the Galaxy Note 8, it too featured a horizontal camera position but came with a disappointingly small 3,300mAh battery capacity.