When it's properly released, Aikar will likely clean it up, make sure there's no bugs and make sure it fits EMC, and then it will come to the Empire, like with all previous updates.
1.9 isn't even close to being out, but it's likely to be a fairly quick update for EMC once it is. 1.9 adds a lot of new features, unlike 1.8, which screwed around with a bunch of code changes that result in a long time in between 1.8's release and 1.8's release on EMC.
Hopefully it will be quite a while. PvP will change drastically with 1.9, and in a negative way, I fear.