I have Amazon exlusive SteelBook with UHD, 3D and BD discs. Unfortunately i cannot get any UHD specs (i don't have an UHD player yet), but here is specs for 3D and BD discs. There are following versions available in the UK (all versions include also Digital Copy):
BD
3D+BD
3D+BD SteelBook
UHD+BD
UHD+3D+BD SteelBook (Amazon exclusive, i have this)
3D disc
Title: Valerian and the City of a Thousand Planets 3D
Country: United Kingdom
Region: B
Releasing Studio: Lionsgate
Case Type: 2-disc Keep Case
Aspect Ratio: 2.39:1
Codec: MPEG-4 MVC
Picture: 1080p
Soundtracks: English Dolby Atmos, English DTS-HD Master Audio 5.1, English Audio Descriptive DTS-HD Master Audio 2.0 Stereo
Subtitles (optional): English HoH
Cuts: No cuts (137:01)
Commentaries: -
Extras: -
Notes: Also available in 2-disc SteelBook and 3-disc SteelBook (Amazon exclusive).
Easter Eggs: -
Source: Checked from disc