So, it was pointed out to me that the previous thread might be too long now and that long threads can cause issues with the forum. Thanks for letting me know, Bored. So, I've decided to reboot the thread...ironically enough. Below is the link to the original thread if anyone wants to check it out.
https://community.cbr.com/showthread...he-DC-Universe
Getting back to business, the Heroes in Crisis #5 preview just confirmed that a bunch of stuff is back: Justice League of America 260; Justice League America 38; Justice League of America vol. 2, 39-40; and Justice League of America vol. 2, 51. So, with that, its possible that the JL Detroit era, the Giffen/DeMatteis era, the Legends crossover, the details of Blackest Night, and the immediately pre-Flashpoint Justice League (where Donna and Dick were members) is now back in canon.