SPOILER Theory: Haven Antiquity And It's Egg.

In fantastic voyage we find a letter from bob, its implied he entered dern through it, and then used his life force as a seal after coming into contact with the dern beast.

 

That means that if you have no proof for it you I (or most people) won't accept it, especially when there are better options available

 

When entering Lutho in AJB Aledar confirms he has been to Gavel as he recognises the power of the Light emitting from the obelisk. But anyways, it doesn’t really confirm he’s been to Dead Island.

 

Ok, that is a point I am willing to discuss.

Still, I think it is more probably to be Bob

 

So bob went through the other realm in the cave into dern? And then used his life to seal in the beast and that how he died? But then what does that have to do with him killing the monster from the egg? Also, why doesnt the player just go into dern from there? If that place even is dern. I don’t remember that quest very well but what I do remember is the cave becomes like purple and obsidian, theres a bossfight, and then you go to the otherside and youre back out. No dern

 

Maybe because he is a hero and isn't focused only on Dern Beast?

And how do you think Dern looks? SE looks like that too

 

Dern could look very different from the Silent expanse. The realm of light and light forest look very different in most places.