You say...My take on that post is that they will join in Moore's suit against Leckrone.

My take is that they've amended their complaint to include Mr. Moore. Hence the paragraph:

Attached hereto as Exhibit A is a true and correct copy of Plaintiffs’ proposed Second Amended Complaint Against Defendants Technology Properties Limited, Patriot Scientific Corporation, Alliacense Limited, and Charles H. Moore. I declare under penalty of perjury pursuant to the laws of the United States that the foregoing is true and correct.