remember that ES will take and use the obvious god to MU combos first. then they likely try to use ones that will be more recognizable. Hera with her one hundred headed snake would better be known to the general public by Hera and Medusa(who had many snakes in her head)
Remember that not all aspects will be mythologically accurate(he he). If things are slightly changed to benefit gameplay and balance that is all right. Notice I said slightly. I would not want to see Zeus with mummies or Ra with beserkers and trolls.
About the Dragon.... I am hunting for the ACCURATE PICTURE, I know I seen it. Alot of these photos are just fantasy novel representation and not true to the dragon of AoM.
Some say death is the end ; I say it is just the beginning.