Star Wars: Battlefront Dev Tracker
title. i dont see the "celebration edition" anywhere
You are able to buy the Celebration Edition as a standalone, or for a discounted price purchase the upgrade. You will be able to find both variants on your relevant platform store shortly. (Xbox Store, PSN, Origin)
If i buy it, will i lose last jedi skins? Its an entire new download (like a new game) or a small patch?
No, you will still retain the Last Jedi skins. It is an upgrade, it adds ontop of the content you have unlocked already - not detracts.
What happens with Premier users once the sub runs out? Do we lose the upgrade?
Still working on a definitive answer for this :)
What happens with Premier users once the sub runs out? Do we lose the upgrade?
Yes
If I get the Celebration Edition through Origin Access Premier - what happens to the unlocked skins if my subscription runs out?
Those skins would become locked once again until you decide to renew your subscription or purchase the upgrade.