A fairly small one that is on the rise now, but it has been noted that the upcoming DC New Age of Heroes that follows event Dark Knights: Metal is a bit of a sausagefest.
When DC first announced the upcoming New Age of Heroes, with their Master Class of artists, it was originally noted how the 'class' were all men. Consisting of artists that the publisher considered the top-tier A-list talent on their books, it was a glaring notion that this selection missed a fairly obvious element of diversity.
Going into the growing New Age of Heroes announcements, and especially after a second wave of titles were announced, it continues to be the case that no women are involved in the project, at least out of the named and marketed creators.
It's unusual, as it is not as though DC is lacking in female creators that could have been included: notably Gail Simone and Amanda Conner could have been part of it, just off the top of our heads.
Of course, it could be that DC will make more announcements in the months to come that may include some actual female creators, but for now it's looking a bit of a boys club.