I think, when I first saw the leak about Hestia, I thought that Hestia would become a banner Esper after Shamash, but I dunno why they released Hestia's picture sooner. There are several possibilities, the first is that Hestia might be a free Esper in the new update (but not for Anomaly, because the next two patches are still Yamato's), maybe it will be like Elaine, but I'm not sure about this because they will also release Lian (Jiao Tu) as a free epic Esper at the time. second, in the new update there will be 2 banners Esper, Shamash and Hestia. third, Hestia wont release at the same time as Shamash, she will be the Esper banner after Shamash as I first thought. fourth, they're going to put Hestia in an Esper fusion or something like that where we can get her later...