One element from the silver age I liked was the concept of other islands surrounding Paradise Island. Some with great threats, and others with mystical mysteries. One story in that era for example had Diana journeying to an island where the flora itself worked to murder any who tread.

Id wanna see a sort of prequel show to Diana becoming Wonder Woman which just explored this concept some. Perhaps tossing in Princess Elva and the Limestone Girls. Or the merfolk and bird people Merboy and Birdboy were supposed to hail from.

Other stories such as 'Diana Princess of the Amazons' and 'Wonder Woman and the island of no return' toy with the concept that the island did in fact keep contact with other likewise secret nations of the world such as the Bana. I feel like there could be some curious ideas that could come of it.