We don't need to do anything everything is ready for the early launch which they will announce in email when the time comes. If you have preordered.
During the deployment stage they will be moving the guild section in game, eventually they will be taking the guild section down from their website.
They are just letting everyone know that deployment is starting and no changes can be made to the guild after deployment starts. No new members, no server type changes, No ally and adversary changes, no promotions or demotions, etc until release.