DC The Source have published a six page preview of Detective Comics #858 featuring Batwoman's origin story. Written by Greg Rucka, art by JH Williams III. The preview also includes the below variant cover by Adam Hughes.

The shocking and tragic origin story of Batwoman begins here! In "Go" part 1, young Kate Kane and her family are kidnapped by terrorists, and Kate's life – and the lives of her family – will never be the same! Plus, the mystery behind the villainous Alice is at last revealed! Then, in The Question co-feature, Renee's search for a missing girl comes to a bittersweet end, leaving Renee with more questions and an even bigger mystery for her to solve. As long as she can survive the night, that is…

For the full preview click here...

(Source - DC The Source)