Seems Darden/IH et al have retained Jones Day <http://www.jonesday.com/> to represent them. < http://freeenergyscams.com/now-we-know-the-defendants-law-firm-in-the-rossi-v-d arden-e-cat-lawsuit/ >
This apparently gives them 60 days to reply in detail. Presumably it'll cost them an arm and a leg, but with $89M at stake ...