As Wazza says "boxing is all about timing" I think if Warren senses Froch is slipping and doesn't have many options post super 6 he may attempt to match Froch with one of his fighters. Would Froch accept though??
As you say Ishy, the problem will be from Frochs side not Warrens (sorry for the lazy "no"), with the possible exception of Cleverly he'll be retired by the time those guys are ready.
I think he could end up fighting Clev but I do not think Warren will want his man to have anything to do with him at all. This would be far down the line though. Clev will fight for a title and have a Calzaghe career against no bodies.