Capcom has released a new character for Street Fighter 5 - and he's basically Evil Ryu.
He's not called Evil Ryu, though. He's called Kage (pronounced car-gay), "the Embodiment of the Satsui." Think Ryu with red eyes, fangs and a couple of cute little horns.
According to Street Fighter lore (yes, Street Fighter has a lore), Ryu constantly battles to control the Satsui no Hado. After the events of Street Fighter 5: Arcade Edition, Ryu overcomes the Satsui no Hado's temptation, preventing Evil Ryu from ever seeing the light of day.