Bleeding Cool understands that DC Comics is going to publish a new Harley Quinn monthly comic book called Harley Loves Joker. With Jimmy Palmiotti and Bruce Dini, it will follow in the Batman Animated Series style and attitude that has recently appeared in the Harley Loves Joker back-up strips in the current Harley Quinn twice-monthly comic book, running the character's twenty-fifth anniversary in Harley Quinn #25 out tomorrow.
After which point, the back-up strips, now it will graduate to a regular book of its very own… with Palmiotti, Dini, and probably with Bret Blevins too. I look forward to finding out later.
Harley Loves Joker #1 will be published… sometime. I would guess November or December, unless DC Comics gets in early with a direct digital version.