Considering that there's still no 3D Debut in sight for their second wave, Obsydia, I'm inclined to believe this reasoning. To those who watch them, did anyone from Obsydia give any hint about them doing recording for 3D stuff in Japan? I know Selen was in Japan during Nijifes, Petra is already living there, not sure about Rosemi.
And yes, I know they have mentioned that the concert would have been the first time we see some of them in 3D, so we don't really need to wait for their official 3D debut, but I would have thought that at the very least their 2nd wave would have gotten it at least.