FYI--Both 2D and 3D discs in this release are REGION A LOCKED.
I have sampled this release, and it is a bit strange. For one thing, despite the region-coding, there are optional Russian subtitles for non-Russian dialogue only, but they are not part of the menus, and must be enabled using your remote.
The big problem, though, is his film begins with a Japanese-language voice over, because the frame story for the main narrative is set during the Japanese Tsunami of 2011. In the US IMAX 3D theatrical release, this narration was unaltered and subtitled. On the English and French DUB tracks on the Blu-ray, it is similarly unaltered, however, on the Russian audio track on the Blu-ray, this Japanese narration has also been overdubbed with Russian voice-over (i.e. a female Russian speaker speaking over the Japanese dialogue). This is extremely annoying and jarring, since this Japanese is the first dialogue heard in the film, and again, this was not how the film was presented in theaters in the USA. The German dialogue appears unaffected, and remains in its original language with relevant subtitles, regardless of which audio track is selected, except on the French track, where German is spoken in the 2011 frame story--this dialogue has been dubbed into French on that track.
I have called SPHE and spoken with a representative. What is strange is that they are telling me that this title should not even be out until May 27th. I was told they will look into the matter and get back to me within a week.
The extras have been divided, with one featurette, The Making of Stalingrad (480i, 11:34) appearing on the 2D disc, and the other featurette, Stereoscopic Stalingrad (1080p, 5:34), appearing on the 3D disc (ironically, this featurette is in 2D). Beyond that, there are forced, but skippable previews on both discs for other Sony titles.
The 3D disc refuses to play on 2D systems, so those with only 2D systems will miss out on the Stereoscopic Stalingrad featurette.