https://www.gamespot.com/articles/ps4-dissidia-final-fantasy-nt-beta-roster-rotates-/1100-6456196/

PS4 players who have yet to participate in Dissidia Final Fantasy NT's open beta still have a chance to jump into the ongoing test, though they'll be unable to play for a brief window of time today. Square Enix has announced that it will perform maintenance on the beta later tonight, January 18, in order to refresh the roster one last time before the beta ends.

Maintenance begins at 1 PM PT / 4 PM ET / 9 PM GMT and is scheduled to conclude one hour later. Following the maintenance period, the beta will return with a new selection of characters to choose from, including Noctis from Final Fantasy XV, who will be playable for the first time during the beta. Other characters featured in the final beta roster include: