Ian I understand your sentiment but I don't think it will come to that. If the German one does get a Le Mans drive I suspect it will be a one off. I can't really see him, or any other ex-F1 prima donna (rather than simply ex-F1 drivers) staying in Sportscars for the long term.
Personally, having seen Herr S race at La Sarthe in the Mercedes Junor team I would be absolutely thrilled to see him race there again. Love him or loathe him you can't deny (if you were lucky enough to be there to see it) his pace at Le Mans was fantastic.
One year of 'full media frenzy' at Le Mans would be a good thing in my opinion.