Pointless.
Once it became clear what a complete fiasco Infinity Next was, coupled with the extreme frustration of the board staff in trying to cope, Endchan /lit/ was created as an alternative migration point. It failed as both as a migration and as a bunker, and became moot after 8chan's administration safely ejected from Mr. Joshs' Wild Ride(TM).
For comparison, fast-forward to the April hack 'n crash. /lit/'s board staff approach this time around? Take no action. We checked in once a day on the status of 8chan's recovery, busied ourselves on various projects, did other useful stuff elsewhere, and waited. A post or two from random passers by popped up on Endchan /lit/. That was it.
In short, we applied the lessons learned from previous events, and observations of the greater chanscape. Should 8chan be trashed again, /lit/ will return provided 8chan itself returns.
I (as former BV, more on that to come) have been meaning to write up some of these lessons, observations, and some minor board News. I'll try to gather these up and post something in the board pages tonight.
TL;DR - no. We don't need no bunker.