On the Letters Page, they've teased the potential return of some of the other Egyptian God relics beyond just Ra and the Ennead. For the most part that isn't a big deal to me, but I was reading about Hathor (the cow-headed goddess of fertility) a while back and ran across something that might be a lot of fun as a character (or a semi-villain, I suppose).
According to at least SOME of the old stories, Hathor and Sekhmet (the lioness-headed goddess of the destruction and the desert) are the same person. In the story, Ra got mad at humanity and sent Hathor to earth in her destructive Sekhmet guise, where she did what he wanted, but then when it was time to come home her bloodlust was so strong that she refused and kept wrecking stuff. Fearing all humanity would die at Sekhmet's claws, he mixed a vast amount of beer with blood (or possibly red hematite) and poured it out in front of Sekhmet, who drank it until she got completely wasted and passed out. Then the gods could get her back to their home and wake her up, back in her kindly Hathor form (and with an enormous hangover, one presumes).
In the game, I imagine you could do something like with Bunker's modes, only it's two different faces of the goddess, kindly healer Hathor and wrathful destroyer Sekhmet, each with different powers and abilities, and possibly some difficulty in making the switch happen when you want it to. (Also: Drinking problem.)