Morpheus doesn seem himself in Revolutions – hes just not kicking butt with the confidence of the previous movies. Whats happened?
Morpheus has just learned from Neo that the prophecy is a lie. It’s another system of control engineered by the machines. While he’s likely not completely convinced of this yet, the simple fact is that this man has based his entire existence on finding the “One of Prophecy” to stop the war and free his people. Now, today, he’s been told his life’s work is a sham. This has a debilitating effect on Morpheus. He cannot lead any longer because he doesn’t know where to go next. It’s up to Neo, and Morpheus still believes in Neo, so he does what he has to do to support Neo. If that means co-piloting the Hammer with Niobe, he’ll do it. If it means being the first human to lay down his weapon when faced with hesitating Sentinels after the battle of Zion, he’ll do it. His role is not diminished, nor is his importance, but the path he’s following has changed. We learn the prophecy is a lie from The Architect’s conversation in Reloaded.