in the movie Elrond said that Aragorn can muster the deadliest army in middle earth...
but how is it that Sauron and the WitchKing has overlooked the dead army and their King?
Couldn't the WK have gone into their realm and claim Kingship over them and use the dead against the peoples of ME...
Afterall, he is neither dead or alive, and he fears no one elf or mortal...so i'm pretty sure he's not afraid of the king of the dead...why wouldn't that have happened...?