"Cook may defend infringers since they are no longer on TPL's side. They know MMP inside out, and may be able to throw a monkey wrench in there, unless of course there was a non compete clause.Opinions are always welcome."

Attorney, client conflict of interest. Attorney, client privledged information. I don't think he would be very effective. He could not disclose any privledged conversations. Which is a good reason to assume that Barco has settled on all patents at issue. I think Barco would have to be out of the picture completely for their lawyers to represent us.