Despite my writers block, which is so heavy I can't get a sentenced in, I have been contemplating the future installations of All aria, including:

An encyclopedia.

The next few continents, one where the magic is primative. That means instead of coming from the soul, it comes from the natural energies of the continent. Something happened there years ago halting the progression from natural to soulful. Anyone familiar with the Malazan series will note this is similar to the Leterii situation.