Then based on that distinction, I would say the DC Special was the first official announcement that Green Lantern and The Flash would appear. I think before that, Cyborg was mentioned, and it was already clear Aquaman and Wonder Woman would make very brief appearances. Though now from all the shared footage it is clear Wonder Woman plays a much bigger role.
So I think the next question is how many of us will drop of a (joy induced) heart
attack after watching Deadpool/ JLA/ Avengers/ X-Men movies within the next 4
months?
Best time EVER to be a comicbook geek.