It could be something simpler like they couldn't get the facilities to print the discs.
March has a heap of games coming out so they might not get the enough printed for a world wide launch. They have 2 discs to print so it's going to take longer.
Wait a few weeks when things free up.
I suppose that's possible, though I would've thought S-E would be priority one. You do make a fair point about the two discs, though.
That actually reminds me of something I was thinking about - I heard a while ago that the 66-100GB discs that are used for UHD movie releases are essentially just Blu-rays, and that the reason why the Blu-ray drives in the PS4 and Pro can't use them is because they can't read them at the specs required for their higher bandwidth. But that made me think how nice it would be if they were used anyway, with the PS4 simply reading them at normal Blu-ray speeds. It would get rid of 2-disc releases and some of the huge required downloads. Maybe that's not possible and I heard wrong, but it would be cool.