"In the comics, the easiest way to bring real life into the life of the hero is to give him a spouse," said Avi Arad, another producer on the "Spider-Man" franchise.
"Lois Lane and the other women, in the comic books, the woman is the other world that represents all of us, and she is there to support, she is there to demand, she is there to observe and to make you think of her as an ambassador of the rest of us," said Arad, who also headed Marvel Studios, the comic-book empire's Hollywood branch, until last year. "Otherwise, there is never a personal story to bring all of us into the room."
I've said it before and I'll say it again, Steve Trevor can not be replaced in this aspect and we lost so much when they threw him to the background after Crisis.
Edit: I commented on Tom's reaction post, and though I'd share what I said with you:
That's the point I thought was self-evident that actually isn't.
Steve's not there to complete Diana, he's there to complete culture Basically, if you look at the original Avi Arad quote, he says women. Not a general character type, but general female character type.
Steve was the male character who served that role for the iconic female superhero. He's gone now.
The iconic male superheroes have specific dramatic setup in their casts. Oour iconic female superheros (Wonder Woman, Supergirl, Batgirl -- Hell, even Storm over at Marvel) do not have the same dramatic setup. There is no dude-in-distress to balance the damsel-in-distress.
Diana doesn't need Steve Trevor. We do.