StarCraft’s reveal trailer squarely put the focus on the Terrans, who later in the cinematic face a terrifying confrontation with the Zerg. The franchise’s three franchises–including the Protoss–have always been a central element of what distinguishes StarCraft from other strategy games. Although the Protoss were effectively absent from the trailer, they are a foe you will face at some point. GameSpot spoke with GM and creative director Dan Hay at BlizzCon and asked him about how the three factions will…