Strangely and sadly if WT collapsed I think many JWs would still refuse to believe that WT is anything other than poor pure persecuted Christ's brothers and continue to pray for them and live as JWs.
Those that are left with the WT security rug pulled out from under them will have to figure it out just like any of the millions of people worldwide leftover from controlling regimes that fell suddenly had to cope and figure it out.
The German people who were in support of Hilter had to figure it out. People are resilient.
That's life.Things change.