For collectors in the United States, if you've been wondering if you'll be able to purchase the Black Series 6" Purge Trooper single boxed like our fellow collectors in International markets, then the answer is yes. The figure will be made available through Gamestop/ThinkGeek separately from the game bundle. Currently the Gamestop website only offers the bundled version.
The STAR WARS: THE BLACK SERIES 6-INCH PURGE STORMTROOPER Figure is currently available exclusively at GameStop as part of a bundle with the Star Wars: Jedi Fallen Order video game and then will be made available for purchase on its own on 11/15.
Thanks to Hasbro for clarifying. Looks like you'll be able to army build this guy!