Wauthan, the Lord of Fertility and the Sphinx are now on my list of pretenders to improve. I agree their graphics definitely need a fresh coat. What is the monster number of the Mother of Lions? I don't remember her at all.
WraithLord, the humanoid pretenders will probably fall second on my list simply because in so few pixels its hard to come up with something entirely new and interesting six or seven times in a row. I will probably start by writing better, more unique, descriptions for each of them and then working on new sprites for a later release.
Jack_Trowell, I rather like the Earth Mother as she is -- namely a very appropriate depiction of Venus-like fertility godesses worshipped by humans since time immemorial. What would you have me change of her?
The white and black dragons I made for the original Nova Deus (in Dom 2) were based on Air and Astral and had a lightning breath and plague breath attack respectively, but were not entirely balanced. They had the alternate forms of a White Wizard and Dirgesinger (think emo bard). I plan on following the same general design for the new versions of each, but may indeed switch the black dragon to Death.
As for Tiamat, Marduk absolutely ripped her apart and is thus
way cooler.

The Mesopotamian creation epic is of course chock full of ideas for pretenders, monsters, and such, but for the time being I'd like to concentrate on improving those already-existing pretenders that really need it (like that poor, poor Lord of Fertility...)