Myth III lead Andrew Meggs chimed in on the FutureMyth forum boards over at rampancy.net in response to concern over the lack of blood and gore in the aforementioned E3 Trailer. Those of you who like to see flowing rivers of crimson will be very happy:
So.... in the movie you see no blood on the mesh and units always gib when killed. In the version running at E3, you would have seen red blood on the mesh like Myth 2. In the version on my PC right now, you see multicolored blood that trickles down hills and pools in ditches, and units that have up to six different ways to die depending on the force and direction of the final blow. It's all about the carnage, baby!