Supergod or more to the point, Supergods are at war and the Earth can’t take it. The Earth is just too small to hold so many gods. This is the result of a god arms race or what was the cold war with nuclear arms. That too was too much for this Earth.
Warren Ellis is upping the ante that Mark Waid started with Irredeemable; Super-powered beings going out of control. Warren has every large and small nation develop their Supergod and then turned them loose on each other resulting in a title that explodes in every panel and the imagination is bombarded with super-beings that destroy and create to destroy again.
Warren Ellis has developed a concept that will be very hard to overcome with Supergod. DC and Marvel will need to re-calibrate their sights when it comes to Super-beings and their effect on humanity.
Avatar is definitely a fresh wind in comics as they contribute to make comics relevant to readers and artists alike.