So, I have a theory:
In the essay published in DC’s comics the week before Wild Storm 1, and reprinted in the back of volume 1, Ellis said that over the course of the first two years, three books would spin-off from The Wild Storm, and then one book would transform.
The three announced books are Michael Cray, Zealot and Wildcats.
Over the course of volume 1/issues 1-6, we’re introduced to some protagonists - Michael Cray; Zealot, Marlowe, Cash, Void and Kenesha; and Jenny and Angie. And Cray has dropped out of The Wild Storm as his own book launched.
So my theory is this: at the end of volume 2/issue 12, either Zealot or the Wild CAT will depart The Wild Storm for their own book. And the other will leave by issue 18. The remaining cast members will be Jenny, Angie and Shen. Leaving The Wild Storm to transform into The Authority…