Possible - DARK - scenario? (Possible spoilers!)

[NikkTheTrick]

That's true. And it would be impossible if this were any other gate. But this one is behind a bunch of illusions, so it might not be so unlikely for them to walk right by it without noticing.

But I doubt they'll give up on it easily. In fact, I suspect it will be destroyed, resulting in a final battle at the last gate (filled with toughest monsters) where everything will be at stake.

And I doubt they would pass accidentially: the gate is located in desert on another continent. Someone coming within 1 kilometer will be looking for the gate.