I read the links you posted pmac. It looks like Gravano was having the conversation with Nino about Paul's supposed intentions.
Call me a conspiracy theorist if you like, but I think Gravano was playing "divide and conquer" against Nino and Big Paul. Gotti and Gravano feared Nino and so had to disarm him by putting it in his head that Paul was going to whack him and to just let Paul get whacked...by whomever, conveniently leaving out that they themselves (Gravano and Gotti) were going to be the very ones to whack Big Paul.
I very much doubt that Big Paul planned to whack Nino once Nino's trial was over.