Will mgm make two more movies after terminator salvation:future begins?

yeah i remember them saying there would be 3 more after T3, i would say that this new one doesn't look like a conclusion to the story so hopefully there will be more. I cant see arnie being in this one considering his status as governor, it probably would be bad press for him. but since his term is up within the next year hopefully they will throw him into some of the later ones. just my thoughts :)