The more pertinent question is where will they play whilst the scaffold is knocked down, shifted a bit, and rebuilt. That’s 3-4 years minimum they’ll be playing in a different ground.
No way, will we ground share (unless we get some cast iron concessions on many aspects of PL football governance?)
So they are left with?
Locally…well if it happens quickly enough maybe Goodson park, after Everton move!
Else there’s not much choice.
Wembley - very short trip for majority of their supporters. Major airports for their Irish/scandinavian contingents.
They might as well move the whole lot down to London, rename themselves London Wanderers, and finally stop claiming to be associated or based in Manchester.
For a stadium rebuild it will have to be Wembley for PL (if still in it) matches and then cup ties maybe anywhere (or just forced to work back through their 12 (and counting) home draws, as forced away draws) for the cups.