Sean Murphy has confirmed he is working on Catwoman: White Knight, a 48-page one-shot that he said will land next year. The reveal came during an August AMA, and it puts Selina Kyle into Murphy's White Knight universe for the first time.
For fans of Sean Murphy's DC Black Label work, the detail matters because White Knight has long reshaped Batman and Gotham City into a darker, morally uneven world. Murphy framed the Catwoman project plainly, calling it "Catwoman: White Knight" and adding, "Is a 48 page one-shot I'll be working on next year. But it's not announced yet.:)"
That last part is the catch. Murphy has already described the format and the timing, but the project has not been officially announced, which means readers know the shape of the next White Knight chapter before the label has said a public word about it. In other words, the project is real enough to be discussed by Murphy himself, but still sits in the gap between a reveal and an announcement.
The tease also fits the way Murphy has been talking about his next stretch of work. He had already been taking a step away from Batman in his next chapter of The White Knight saga, with a separate project expected to lean more heavily on the Justice League and bring Wonder Woman and Green Lantern to the forefront. Catwoman: White Knight now adds another piece to that evolving corner of DC, and it does so with a simple promise: 48 pages, next year, and no formal launch yet.
That leaves the most immediate question unresolved. Murphy has told fans what the one-shot is, how long it will be, and when he plans to work on it, but the official announcement date is still unknown. Until DC Black Label says more, Catwoman: White Knight is a confirmed project with an unconfirmed unveiling, and that is exactly where the interest now sits.

