Capcom recently announced the bosses and their acquirable weapons for their upcoming Mega Man 9:
Concrete Man: Created to construct a dam, Concrete man can actually design a dam and supervise its entire construction. He has stubborn a stubborn personality and will tell off any lazy robots.
Weapon: Concrete Shot
Concrete shot creates a temporary foothold as soon as it touches the ground. It can also be used to stop enemies in their tracks.
Works for the Weather Manipulation Office to help control and stop the formation of large storms all over the world.
Weapon: Tornado Blow
Tornado Blow launches a huge tornado that covers the entire game area. Heavy enemies will take damage, but lighter ones will be blown entirely off-screen.
Magma Man serves as the safety control robot at a large geothermal power plant. He is able to work in incredibly hot environments and loves to visit hot spas.
Weapon: Magma Bazooka
Magma Bazooka shoots a cluster of fireballs that spread out after launching. It can also be charged by holding down the shot button.
Capcom promises more info soon.