I've got a few suggestions for new powers, or rather, elements, if you'd like. Some of these will probably only be able to be created with the SDK, though.
Blast - Gravity
Visually, it's the same bluish non-elemental concussive blast that super-powered homies use. It levitates enemies in the same way that the gravity element for stomp does.
Blast - Lightning
A blast that electrifies its target, causing bolts to shoot out and strike nearby targets.
Blast -Rock
A high-powered blast that sends enemies flying.
Blast - Life Steal
A blast that makes enemies drop extra health on death.
Telekinesis - Fire
A wave of heat surrounds the lifted NPC or object, igniting anything nearby.
Telekinesis - Ice
A cloud of cold surrounds the lifted NPC or object, freezing anything nearby.
Telekinesis - Gravity
When thrown, the thrown enemy or object spawns a black hole at the point of impact.