In some ways they have already tried to modernize Wonder Woman. Jodi Picoult for example made her talk and think like a human being for the first time. Trouble is, that fans started screaming instantly and demanded that the character be restored.  Then with Gail Simone, Diana was more or less back to "normal".

 I don't know how to modernize her though. I suppose I would make her openly lesbian and run with that.  Or make her the most powerful character  and see how the male counterparts deal with that.

D'oh! Why do things that happen to stupid people keep happening to me?