If you are interested and live near one of the listed retailers, be sure to inquire for more information
Also of interest, FFG simultaneously posted the official Rules Reference, which is linked to in the Launch Weekend article as well as the Legion product page (at the bottom under "Support"). To quote the from the opening paragraph, "This document is the definitive source for all STAR WARS: LEGION rules." Note that this is an online document will be revised and updated as needed.
Even though the game is yet to be released, reading through the rules ahead of time will can of course help you get into the game that much sooner once its available. Some sections that might be of particular interest are additional terrain rules, clambering/vertical movement, and competitive terrain placement (which will probably be used during Organized Play events.) For any of you that are looking to construct your own terrain pieces, these sections can help guide you so that your terrain provides a variety of gameplay interactions in addition to looking cool on the table.
While skimming through the glossary I also noticed a couple of unit keywords listed that haven't shown up on any revealed units so far:
- Guardian X (Unit Keyword), pg 28: (So technically we already knew about this one since it does show up on the Esteemed Leader upgrade card seen in the General Veers and Leia Organa previews- but I wouldn't be surprised to see it on a future trooper unit either, like perhaps a Rebel Honor Guard unit.)
- Unhindered (Unit Keyword), pg 43: This prevents the unit from being slowed by difficult terrain. I would expect to see this on Special Forces units, like perhaps a unit of Scout Troopers. It might also show up on a Gear upgrade card.