I thought they were much better as presented in the movie, with Ra being the last of his species (and, if I'm not misremembering, the only one to have inhabited a human at all).
If anything, I'd rather the series continue on with what the movie was actually trying to do; rationalize where all of our myths and legends originated from. Not just the Egyptian pantheon and later a half-hearted attempt to work in a few other pantheons. Dragons, demons, oni, fey, yeti, sasquatch, etc. could have all been potential story ideas, and pretty good ones, too, if enough time and throught were put into explaining everything. It would certainly have lead to a much more interesting and varied universe.