MangaGamer had announced during Anime Expo 2015 that it'll release a Steam version of Umineko-When They Cry. This version will feature an updated English translation of Witch Hunt, new sprites and the full original soundtrack. MangaGamer's 7th Expansion site can be found here.
Lion is the child whom Natsuhi Ushiromiya abandoned from nineteen years ago. This person appears in the seventh game, Requiem of the Golden Witch, under the circumstances that Natsuhi accepted the child that Kinzo had given her to raise in order to prove her capabilities as a mother. It is suggested that because Lion exists, Beatrice, the Golden Witch doesn't exist, creating an alternate set of events to occur on Rokkenjima in 1986.