User blog comment:Aidanthehedgehogisawesome/Martha Wayne and the Court/@comment-1038387-20150502072115/@comment-1639863-20150502220020

Right before Flashpoint, pretty much. Nightwing Vol 3, IIRC, begins with Dick returning to the NW alias after Bruce's return. I just noticed that Rab actually mentioned it on the Bruce's PE page in the section preceding the Court of Owls.