Now for those of you who where disappointing as I was yesterday when all we heard was, "something big was coming", I may have figured it out (probably not, but it is interesting I think):
Now for those who read it, in the Aftermath books, there is a Super Star Destroyer called Eclipse (pretty sure it isn't the Legends Eclipse, just a regular SSD), and it supposedly went missing, and rumor has it that it will be in TLJ. If this was true and FFG wanted to do a minor tie-in with TLJ, they in theory might have to wait, as Disney may not want it spoiled just yet. But it still would work thematically with the OT because the Eclipse was built then, not for the First Order. The SSD would like have upgrade cards featuring both Eclipse and Executor (maybe even a Lusankya, who knows).
I of course may just be going crazy, but it makes sense to me.