My guess is that the next arc following Olympus will be a justice league story or will focus on the crisis. It might also act like a back door origin for Shazam hopefully because he has been teased a lot. I think the next special will be about the teen titans. I mean the have been teased in Olympus. Hopefully because I really hate Valkyrie and Hollow because they for use on main characters. I don't want to see that I want more universe building. Effigy was amazing because not only did it let us learn more about secondary character it introduced new ones. But hollow honestly feels like it could've easily fit in to Olympus. Also I guess I just hate valkiyre because of Lana