Jarred Land from RED has announced a new RED camera in the RED User Forum in typical RED teaser style: The RED Ranger will only be available in camera rental. Currently there is only one picture of the new RED Rangers, but it allows some statements about the new RED Ranger. The display on the side shows an attached 8K resolution.
RED Ranger 8K Camera
This would make the new RED Ranger 8K the third 8K capable camera in the RED portfolio alongside Monstro 8K VV and Helium 8K S35, or the fourth if the DXL Panavision is added. Of the sensor size, only full size and larger would really make sense for a rental system. If RED were to use its 8K Monstro VV sensor, which is also used in the DXL, the corresponding sensor diagonal would be 46.31mm. But at the moment everything is speculative - there should be more information about the BSC Expo ...
Thanks to slashCAM user Kurt for the hint.