I don't think we will get it in april, fates was only game in the last direct to have no info on its release date, every other games had at least something like beginning of 2016,fall 2016 or even just 2016.
I think that even NoE didn't know the release date at the time of the direct because there was a problem with the EU version and they were still hoping to be able to release it at the beginning of 2016 but they weren't sure,so they decided to say nothing.
For exemple, it is possible that the game was code in a way that make it difficult to have more than one language, so the IS may have to rework on the EU version because of that, it could be the reason why fates doesn't new DLC since october, the team may be busy working on the EU version.