I often wonder how that would have gone. Assuming she was created at Atlas, I think it would have changed the tone of the Marvel Universe considerably, since she was likely a bigger star than any of the Atlas heroes.
But also, I'm sorry, but it's pretty clear that the one weakness of early Marvel during Stan's time was the female characters. As bad as it got at DC, I kinda shudder to think of a Sue or Wasp-like Diana.
However, then I think, I wonder what Chris Claremont in his prime could have done with Wonder Woman at Marvel.