What makes a good classical lit mashup?

In my research of  remix and mashup culture, particularly of classical literature, I encountered this excellent blog http://eskymaclj.blogspot.com/2012/09/mashing-up-literature-rap-fairy-tales.html that discussed what makes a good remix of classical literature.

I particularly liked this definition of a good classical lit mashup:

"To be read in my classroom, a mashup must maintain the core integrity of the original in terms of plot, character, narration (although this may change from the original) and complexity.  It must also add something new to the original that, because of the creative and interpretive nature of the mashup genre, makes the original text more approachable.  A remix is meant to be read with the original."

This blog also led me to discover this man called Baba Brinkman, a "rap troubadour" who does raps of classical literature, adhering to the above definition of a good classic lit remix. Here's a preview of his "Canterbury Tales" rap:

You can find his website here: http://www.bababrinkman.com/

I  think this info will prove very beneficial for our own Monster Mashup group, in helping us know that we need to adhere to the original themes of the classical text, but can still creatively break quite drastically from the original form to make it applicable to a modern audience.