The human mind is a funny thing. It contains an incredible level of complexity. Who are we to say what happens to it? Furthermore, why does it matter? It's not like they can come back and tell us.
Also, if I understand the Bible correctly (which is incredibly unlikely as I've never read it), the end of the world involves everyone coming back to life and either bodily ascending or going to Hell. By that logic, everyone would be crushed to death before anyone could do either.
Now, let me finish with a computer brown townogy. Let's say you build a supercomputer unlike any other. It's so advanced it can command a simulation of an entire other universe. In realtime.
Then there's a power failure. The computer and its programs all crash. All the data is lost. We'll never be able to run that simulation again.
Who are we to say that computer wasn't just a bridge? We can't prove they've stopped existing, and why should they? What right does our universe have over theirs that says theirs should be destroyed. And even if we do have some divine parental right to end it... what do they experience when it ends?
In other words, I don't think there's a simple, easy, or likable answer to the problem of what happens when we die.