2. All the Gods: Are Artificial Robotic constructs. They've been Created by a superior Being to protect Mankind. That includes Thor. Most of the time, they stay in a state of non-fonction until they are needed and are "awaken". Like a car or any cybernetic appliance. There's only 12 Gods. There's not many different families of Gods and Pantheons, it's the same Gods over time that changed names and roles.
In the present time of 2016, most of these Gods wear normal human cloths of this era except for Thor who has remained faithful to the era where the Vikings were, he actually fell in love with a human woman in those times and adopted children. But was "put out of fonction" around that time and awoke in present day Earth.
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3. The Inumans/Eternals/Atlantis: Are all the same. The land of Atlantis was the most advanced civilization that's ever existed. Until they came into contact with various other civilization on Earth that were jealous of them and they waged war on them. But the Atlantean we too much so the artificial Gods since they were created to protect humans, waged a war against Atlantis and their Leader Black Bolt. The Earth was almost ravaged and the Great Flood came in.
Atlantis was really like Atilian and the Atlanteans are The Inhumans, super-advanced and have countless powers. And they escaped to the tallest mountain to avoid being killed. Meanwhile the Gods saved one human and his family, Noah. Black Bolt's brother is not Maximus but Namor although his name is Icarus, like the legend.
It's 2016 and Icarus comes back to his people in the Himalayas and he has vengeance for mankind in his heart and wants to bring back Atlantis from the depth of the Ocean regardless of the consequences. Black Bolt and the rest of their people are not sure cause they have lived happy in secret in these mountains.