I'm still confident Warner Brothers has a marketing plan in place. It's anyone's guess what it is. But it will definitely surface eventually because something tells me few entities involved want the film to succeed more than Warner Brothers, the studio that's distributing it.
That being said, though, as fans it IS frustrating that we haven't seen anything yet. But then, Warner Brothers doesn't really have to market the film to us. And we're frustrated exactly because we're fans. But I doubt the general public is frustrated. And something also tells me that Warner Brothers has a plan in place to try to attract them. And apparently, for some reason that's known only to them and the others involved with the film, they don't think that the time to do that has arrived yet...