The time-locked expansion server will start subscribers over at the earliest era of the core EverQuest II experience, after which expansion content will unlock at the rate of one every 12 weeks. The Fallen Gate FAQ has all of the information you’ll need to make a decision whether or not to roll a character on this server.
One of the key incentives for starting over on this special server is to gain rewards for all of your characters: “Heritage Quests are a staple of adventure in EverQuest II and we have some exciting rewards for those who complete them on Fallen Gate. Completion of any HQ on the Fallen Gate server will not only provide the normal reward, but also make a level appropriate version available for all your characters! Time to take those Journeyman’s Boots off the shelf put them to good use!”