Title says it all. What non DC comics characters would you like to see Diana meet? For me:
Korra from Legend of Korra. Both are fighters with supernatural powers. Both are representatives of supernatural forces.
Lightning from Final Fantasy XIII. Both have been goddesses at some point.
Bayonetta from Bayonetta. The Umbra Witches actually have a few things in common with the Amazons, especially the Golden AGe versions.
http://bayonetta.wikia.com/wiki/Umbra_Witches