Before revision:  Finally we write out expressions for the convex quartic locus of the incenter for a generic Poncelet family, conjecturing it can only be an ellipse if the pair is confocal  .
After revision:  Finally we write out expressions for the convex quartic locus of the incenter for a generic Poncelet 3-periodic family, showing they are roots of a quartic. We conjecture (i) those loci are convex, and (ii) that they can only be an ellipse if the pair is confocal .