The Boston Globe has one of the more detailed articles on the London trial against Random House.
According to the Globe article, Random House lawyer John Baldwin, "said many important themes of "The Holy Blood and the Holy Grail" did not feature in "The Da Vinci Code," particularly the idea that a secretive order called the Priory of Sion exists and seeks to restore descendants of Jesus Christ to the thrones of Europe.
"Baldwin said this was a 'massive point' in the earlier book but was not stressed by Brown.
Interestingly enough, the Random House lawyers in my case are stressing similarities like this from HBHG in order to divert attention away from the similarities with my own works.
It seems clear that Random House intends to further misrepresent things from one court to another in hopes that no one is watching what's happening on the other side of the Atlantic.