CHAMPIONS! We are adding a week to your testing cycle! Now, in addition to your usual two weeks at the end of every season, Pantheon will now be available for you to test during the FIRST week of the season. This gives the Champion tier pledges the ability to see the new content first, and also allows for the team to get that all important initial feedback.
Supporters are encouraged to upgrade as this change takes effect this season as we welcome the Summoner and Ranger into Terminus. See you in game.
And according to https://www.pantheonmmo.com/seasons/ this next season (starting June 22) will have 8 weeks of testing, 5 of which will be playable by champion tier pledges.