I have enjoyed this story greatly. I am a fan of both the harry potter universe as well as DC universe. I like how even though traditionally Harley Quin and Ivy are villains they are being portrayed as misunderstood heroes, much like batman was. Expanding on the current people in the story is great, adding a few more to the organization being built by Harry and the Duo could give you more to play with. I like that you gave us a site with timeline/ mics info, to me it makes sense. I would be curious to see if during this arc it would be found possible for Harry to return to his universe and restore order if needed/ causing some chaos to Dumbledore/ the Ministry/ the purebloods. I have learned that Smut isn't a requirement for a good story, though sometimes it adds some interesting flavors throughout the story. I will say it is a great story. keep writing.