I think that I might be on to something here. We are assuming that Lavos is still alive after bursting through to the surface. I've always thought that the attack that you see him do during the cutscene was actually him dispersing his young into space. People might argue, but think about it. If a huge creature was to burst out of the ground today and starting shooting his young into space, but some come falling back down to earth, wound't the government and everyone on the planet think we were being attacked? We assume it is an attack but it just might not be. And what if Lavos died during the "Birth". What would be left, his shell. I believe in the game that someone says Lavos reign high above death peak. Considering the fact that this game is being translated form jap. who's to say that the sentence could have been Lavos(plural form) reing high upon Death Peak. The reason why I bring this up is because after climbing death peak, do you see Lavos(the one that broke through to the surface)?
I think that Lavos is the name given to the type of organism it is. Lavos shell could have tumbled over to where Death Peak is. The reason why we see Lavos(spawn) on death peak is simple. They migrated. The shell was there.And if you think about it, How many Lavos(Spawn) do you see while climbing death peak? not alot. So the must have either left, or died off. Lavos shoots his offspring into space, where they hurl through it, until they land on a suitable planet. the ones that didn't make it out of the atmosphere crashed back to Earth, detroying parts of it in the process. Some died from the impact(Defects), others landed, but since thew planet was already dying, they had no way to feed, therefore they stared dying off.
Also one question still haunts me. When you fight the spawn on Death Peak, when they r defeated they leave their shell behind. How come they don't enter the shell and fight the core? Is it because they don't have a core? If that is the case, How did the original Lavos core come to be?
Just my opinion, tell me what you think?