I don't think so. They wouldn't make that big of a deal if it was an SV. (By the way, they can't use the Superleggera name again because of litigation
) Well. It'd be a big deal, but not a "It’s not just a new Lamborghini. It’s a new world." big deal. And the license frame/exhaust/diffuser layout doesn't seem to match the Murcielago's, and I don't think Lamborghini will do another design change to the Murcielago in its lifetime.
The Espada rumor's been around for a while (including photographed miniature clay models of the car), and with the Aston Martin Rapide and the Porsche Panamera coming out, I can see no better time for a new Espada.
Who knows, maybe you're right after all. Maybe I'm right...