It would take some serious thought — and serious rigging — to create a real transformer effect, but if you want polygons to basically explode and reform on another object, you can do that with pBlurp or MoGraph.
In MoGraph, you would use the Inheritance Effector in Direct mode, with the “morph motion” box checked. Apply the effector to the fracture object.
Then create a matrix object set to object mode and have it reference the second object (the one you want to morph into). The Matrix Object should be set to Surface mode and the count should be set to the number of polygons in the object that you’re fracturing.
Finally, set your inheritance effector to reference the matrix object and animate the effector’s strength parameter to perform the morph. You can add in some other effectors and/or deformers create fancier effects.