Beautiful scene, but there's no way in hell something like that ever happens. Patrice would fracture the other part of Chara's jaw if Chara ever tried to give him the C without retiring. My impression is Patrice has way too much respect for Chara to EVER be captain while he's around.
They're functionally co-captains - I know I've heard Chara let that slip a couple of times. And there's no doubt that, if Chara plays x more years, then in year x+1, Patrice is captain. But there's not going to be a Bourque/Espo moment where Chara removes his jersey with a 37-C to reveal a 33-A jersey underneath.
But holy crap, the one -REALLY- cool doable idea would be for Chara to be banner captain. If he doesn't play Thursday, and if they don't have Brady already lined up...that's exactly what you do. We had Wags wave from the zamboni doors. We saw Pavelski do the same thing. Chara waving the flag would be check and mate, even before the game started.