Warcraft Total War is a total conversion mod for Medieval II Total War. Our goal is to bring the Warcraft universe into a Total War game. This mod will feature epic battles with units from the Warcraft universe and a new campaign that will cover the events of the Third War and beyond.
The Dreadlords and the Infernals have been added to the Scourge when they have "all" selected in the custom battles. They will most likely be available in the campaign for them as well.
I've removed all their siege engines.