The new Stronghold is part of the Pinnacles of Power update, which is also bringing new story missions for both Republic and Imperial characters to play through. This new update is due to arrive at some point next month.
The Alderaan Stronghold is back on the Public Test Server! The Alderaan Noble Estate will go live with Game Update 6.1 'Pinnacles of Power' next month.https://t.co/uqnNNCtp9A pic.twitter.com/lnPKT58d1z
— The Old Republic (@SWTOR) January 17, 2020