In the new issue of the comic, Selina Kyle (aka Catwoman) kisses a woman.
Her bisexuality is now canon. Writer Genevieve Valentine posted about the (non)revelation:
She's flirted around it – often quite literally – for years now; for me, this wasn't a revelation so much as a confirmation. And as Mark Doyle and I were first hashing out the relationships in this arc, Eiko (Hasigawa, who has recently taken on the Catwoman persona) seemed like the right person: intelligent, driven, in that uncanny valley of Almost Catwoman, and knows enough about Selina that their honesty has become something of a shelter in a situation that's getting increasingly dishonest for everybody involved. The more we talked about it, the more it was something I wanted to make happen.
Was it a surprise for them? In terms of their sexualities, not particularly; certainly it's no surprise to Selina that she has an attraction to a woman.