The biggest set of questions I have right now revolve around Lucifer.
Lucifer's traditionally referred to as "the Adversary" and has a history of corrupting people by granting them free will, just like Nemesis. He's been consistently off-screen in the books so far, but he definitely exists.
So the big question is, then -- did the Adversary/Nemesis corrupt Lucifer, or is Lucifer "The Adversary"? It's an important question because it also speaks to the power of the White God over Outsiders -- are they truly Outside his Creation? Outside his Plan, or part of it? If "The Adversary" is Lucifer, then the Outsiders are, at least theoretically, part of God's Plan; if Lucifer, and the demonic evils he represents and leads, are a separate evil from the outsiders, then maybe the Outsiders aren't part of God's Plan, which is terrifying on a whole 'nother level.
In other words, is what happened to Molly part of God's Plan, or a corruption of it?