There were no gods involved in the origin of Athas, and there are no gods there now. But that does not prevent an 'interloper event' where some god(s) found Athas and tried to move in.
I honestly dont understand why some players can be so obsessed with gods, and so driven to try force them on other players.First, the mysterious beings could be gods. Second, demigods ARE gods. They're just the weakest kind in 2e.
If players enjoy them, great. But why push them?