A new event calendar has been released. We are getting a grand hero battle against Lyon, shortly after a "new heroes" summoning event starts. So I expect some more units from Sacred stones to show up. Which is awsome. Valter also gets a rerun.
Besides that, we will also be seeing a "Choose your legends" event, at which Feh hinted during one of her announcement videos. The site would go live today, but they didn't link to it.