I'm overjoyed to hear that you're probably doing a sequel to Elantris. I was wondering, though, if you plan to discuss anything further about the religions you mention less in the book. I think both Jesker and the Jeskeri Mysteries receive too little attention for how interesting they could be. It would be interesting if we got to learn more about the origins/tenets of both. It's rankled ever since the first time I read the book that something which seems so significant as Jesker is left so undeveloped.
Yes, actually. I want to focus more on Jesker, and the Mysteries, as well as the original religion that spawned both Shu-Dereth and Shu-Korath.
Jesker is very important, as you have noticed, since it's the religion tied to understanding the Dor. It's actually much older than the other religions, relating back to things that happened long ago. Because of this, it retains hints of things such as the origin of the Seons and the like.