So, as an example, this is not Legion, but there was some kind of supply problem at Gencon. Their article says that one of the L5R expansions would be available for pre-release - it was later stated at Gencon to not be available. Now there's about a million reasons why this could happen, but he fact of the matter is, they called the ball, and ended up wrong, which generally looks bad. This is why I believe FFG usually airs on the side of caution. For Legion they're developing a lot of product in parallel or in batches, as we can see by the serial numbers, and the devs and marketing kind of collab on when to do releases. They want to do a big push at Gencon for the core, so they make sure they have plenty of core sets for pre-release and it doesn't make sense to not also just get inventory and release it sooner rather than later. But then you get the pileup. You have a couple dozen releases queued, in printing. Maybe your Clone Wars commanders are a bit delayed, so you have to push back the whole CW line. Maybe some of your stuff gets leaked, so you have to go to announcement and maybe ship a bit sooner. Maybe the boat carrying your first run of clone wars stuff has sunk, and they have to send it again so you have to rebuild the whole release schedule.
The important thing to remember here is that unlike this digital message, which is instantly transmitted to your screen all of the hobby stuff is physical. It's printed in China mostly, or a little bit stateside or in Germany or wherever. Then it has to get boxed up and boated or flown to FFG warehouses then shipped to customers. There's a lot of points of failure in there, and it's a lengthy process, so you have to be careful what you announce when, otherwise you have customers who are angry for no reason, because their disappointment won't make a container ship move faster. So, they know for sure CW stuff will hit the window marketing decided for Q1 next year, Clone Wars is your big thing for Gencon? Boom, big announcement rollout. Got a few more "surprises" from marketing later, you sit on it, especially if your schedule isn't locked in yet.
Edited by UnitOmega