Second, and somewhat more intriguing, the update mentions a new feature in Halo Wars: leaders. Before any given match, players will choose a leader. Each leader will bestow certain abilities, lending another layer of strategy to the game. For example, one leader has the ability to call in a carpet bombing, while another leader order a devastating MAC gun blast from orbit. A leader may also be able to command special units, such as Captain Cutter who can utilize the Elephant, which acts as a mobile barracks that can train new troops. Another leader can command the mech-like Cyclops units. Choosing a leader that complements a player's given play style sounds like it will be key to victory.
Don't get to excited though, Spring 2009 is still a long way away.