That it took two years for the New 52 to have a line-wide event is something that seems almost unthinkable, considering both the dependable regularity of such series before Flashpoint
, and also the two-events-per-year schedule over at Marvel these days. This isn't to say that there weren't big storylines unfolding, but things such as "Throne of Atlantis," "Rise of the First Lantern" and even "Trinity War" were all kept relatively small, making them arguably more attractive to readers who didn't want to commit to 30+ issues to get the whole story, and also more organic in terms of storytelling.
Forever Evil, of course, is a far bigger beast -- one that includes an 18-issue crossover inside the main event, as the Dark books have their own event-as-part-of-an-event. It remains to be seen whether this is a special occasion or the shape of things to come. I can't help but wonder if I'm in the minority hoping that it's the former.