Instead of a God, make them lead to a portal to Tartarus and have 4 Titans to align too. They played a large role in most of the games and I would love to align myself with one. I would suggest Cronos (however you want to spell it), Atlas, Gaia, and Thera. Im aware it may not make since because they are imprisoned but it would make it more playable. It could add a game mode like gods vs titans. This more than likely wont happen but I believe it would be a welcomed addition by most fans.
The gods overestimate themselves.