During his interview with Comicality, the current Wonder Woman author Greg Rucka finally addressed whether or not Wonder Woman's bisexual (rumors and speculation had long since been running wild):
[Y]es, [Wonder Woman is queer]. I think it’s more complicated though. This is inherently the problem with Diana: we’ve had a long history of people — for a variety of reasons, including sometimes pure titillation, which I think is the worst reason — say, “Ooo. Look. It’s the Amazons. They’re gay!”
And when you start to think about giving the concept of Themyscira its due, the answer is, “How can they not all be in same sex relationships?” Right? It makes no logical sense otherwise.
It’s supposed to be paradise. You’re supposed to be able to live happily. You’re supposed to be able — in a context where one can live happily, and part of what an individual needs for that happiness is to have a partner — to have a fulfilling, romantic and sexual relationship. And the only options are women.
But an Amazon doesn’t look at another Amazon and say, “You’re gay.” They don’t. The concept doesn’t exist.
Now, are we saying Diana has been in love and had relationships with other women? As Nicola and I approach it, the answer is obviously yes.
And it needs to be yes for a number of reasons. But perhaps foremost among them is, if no, then she leaves paradise only because of a potential romantic relationship with Steve [Trevor]. And that diminishes her character. It would hurt the character and take away her heroism.