Thing I doubt that you ever get more than two or three justices on the same flight. It's not as if they go traveling together on circuit to hear cases.
Still, if such a tragedy were to occur today, I'd expect Obama to nominate O'Connor as Chief Justice, and Stevens and Souter to take back their old seats, as well as three pairings of a Republican and a Democrat.
The idea is to give the wiped-out court some experience, as well give three quick nominations that the Senate would likely agree to quickly confirm with a voice vote under the circumstances while the six additional justices were vetted and nominated. My expectation would be that Stevens and Souter would likely re-retire after a year or two. I think O'Connor would remain for a while, as the main reason she retired no longer applies.
did she find the fountain of youth?
