Kudakidd, the Prowler was riskier than a hemiViper, and I don't flip through hundreds of threads that don't interest me.
A hemiViper could be a limited run. How much extra energy would it expel from DC ? Next to none I believe.
And depending on how limited, people like: Leno, Bon Jovi, and Seinfeld would grab em all first.
It would be more of an advertisment move, to get their name thrown around at more back yard barbecues.