The current Season is ending on Sept 27 as per the Seasons page and the next season that introduces the Necro is listed on the Production tracker as starting on Sept 28 https://www.pantheonmmo.com/pantheon-production-updates/
Previous Seasons have been 6 weeks long, except for the one that was extended to 8 weeks to allow VR staff to take their summer vacations. So it's very likely that Necro will officially be 6 weeks long as well. If so, then Champions should get access starting Oct 26 and Supporters starting Nov 2.
Thanks for this, I am aware however people wanting to invest into the game potentially right now don't know what happened in the past.
An update to what they are doing is all so when you send people there they have an idea, Joppa also said that when the Champs / pledges ends for the next season the thought is they just continue into EA, some direction of clarity hopefully posted soon since it starts this weekend so expectations are out there