Whilst it would be marvellous if they came to play here we'll be disappointed. There's a history of clubs in London moving, Arsenal from Woolwich, Millwall from the Isle of Dogs, Wimbledon from near Wimbledon, Orient from Clapton [or was it Leighton Buzzard], QPR from Queens Park [they had to...
No problem at all, although Charlton would be the obvious choice, given Charlton played at Selhurst for a few seasons in the late 80s. Good luck to Palace whatever they decide to do.