Hi folks, Ed here. Personally I would love to see them adapt the first 14 issues of the George Perez run. Olympus with its mind bending perspectives - the door to the underworld that the Amazons are protecting - the mysterious presence of a modern gun on the ancient island - Diana fighting the creature: Decay - and ultimately Ares - before descending into the darkness under Themyscira and discovering her true purpose.
They could bend the story a little - okay a lot - for the sake of having Ares as the 'big bad'.
I won't go into any more details because of spoilers - but I believe it would make an exceptional emotional arc. Yes, it would need to be a three hour movie but hey - it ain't gonna happen so I can dream can't I?