Oh dear, oh dear. All that PR'ing, and it comes to naught. Frank Sorrentino has apologized (and identified Fletcher as a "con artist"), and according to news reports, Fletcher has been ordered to pay $5,000.
Per the legal documents (which I've been accessing through PACER), the court granted the preliminary injunction (though not before Fletcher filed a counter-suit alleging defamation by the plaintiffs), and all parties subsequently reached a settlement (though not before Sorrentino and Fletcher each identified the other as the main actor in the affair).
Probably safe to say there will now be no "six figure" book deal...