With the hours the 777 Captains are being rostered..a better question might be "Who is going to fly this?"
Surely there will be 777 Captains to fly the route......unless you meant it as a pun of some sort or am l missing something. There's always pilots in EK to fly even if they are overworked/fatugued at this moment in time. By then there will be more online from fleet transfer, upgrades, DEC's (if need be).....the "show must go on"