I must say I find the idea stupid !
Mr. Noah is not irreplaceable. Ok, he did great as a captain, ok, he's a fantastic leader, but it was a long time ago.
For a few years, he uses to say he doesn't give a damm in tennis. He doesn't stop criticizing his former sport saying it's not interesting, that he doesn't follow anymore etc... ! I don't know why they should call to a guy who's so negative about french tennis.
I imagine him coming as a hero. No. The team doesn't need him to win the DC, only not injured men.
I prefer him to keep on making good songs and dancing.