celestia is rumored to have to parts to it. some say its going to go on to be like grizzleheim, where you would go to celestia do a quest chain leave and then come back at a higher level. While others say that it will be a world with levels and attacks higher than 50. What do you think/know or want Celestia to be like?
It was mentioned that Celestia would be a world after Dragonspire. So, upon defeating Malistaire, you would gain access to it. It will probably be for wizards level 45 and up, as the monsters are going to be harder (more life, better A. I.). It may be difficult to venture through if the wizard skipped most of the side quests leading up to Dragonspire...