F4WOnline is reporting that, thanks to the Icelandic volcanic eruption obscuring much of Europe's airspace, WWE's wrestlers will most likely not be able to make it back to the US in time for Raw live from East Rutherford, NJ and the Smackdown/NXT taping in Uncasville, CT. Based on wind activity, Belfast, Northern Ireland had been seen as the Raw crew's best site to leave Europe from, but now those airports have been shut down. The Smackdown crew is having similar problems, only worse: Their planned exit airport in Spain was closed, and then their bus broke down. All of the writers and executives are in the US. I would guess that they'll opt for putting some kind of archive-based programming to fill the six hours of TV this week and pray that the crew gets back as soon as possible. As for exactly what will air, that remains to be seen since they've never had a situation like this before: The only canceled taping was the June 25, 2007 show that was then used a Chris Benoit tribute featuring some of his most memorable matches.
Theoretically, I guess that they could do a show with the FCW crew, Funaki, Vince McMahon, Dusty Rhodes, Josh Matthews, Jerry Lawler, and Striker, but I doubt it.