the New 52's attempt to make the Wildstorm characters major players in the DCU failed. But I still think there are a number of charcaters who could be incorporated into the larger universe. Midnighter is currently featured in one of DC's best written books and he's had some great team ups with Grayson.
Speaking of which there were some Wildstorm sightings in this month's issue of Grayson.
(Minor spoilers)
While Helena Bertanelli is having a meeting with members of rival spy organizations we can see one of the shadowy figures is Grifter. I believe this is his second appearance as he was in a similar scene a few issues back. He definitely needs to be used at lot more in the DCU. He was in Future's End but didn't actually wear his costume and was pretty much just the straight man in Fifty Sue's act.
During the final scene while Agent 37 aka Grayson is infiltrating a secret layer LADYTRON shows up! I'm really glad to see they're using her here. They hinted at the character way back in the Team 7 book but nothing ever became of it. She's an interesting character created by none other than Alan Moore. Would love to see her have a run in with Cyborg down the line.
These characters are never going to rival DC's top heroes as far as popularity and page time but they can still play important roles in the mid tier books.