Robert Plant like for Salome is mentioned in BP Fallon's book, but it seemed to be just an off the cuff response to BP's question, rather than a considered reply.
I think there is something in the story to be honest. If they ever do release the album it will be their last, and if they tour again, that too will be their last. Larry is the boss, and I think the classic split reason of 'musical differences' is on his lips right now. They just seem to not be 'one' anymore.