"No one believed me, I am humanity's last hope" Those words are not something either Bennet or Hiro would say but they are definitley something we could imagine from Sylar.
I completely disagree. That in no way sounds like something Sylar would say.
I've seen nothing in Sylar that suggest he cares about humanity enough to stand up to something like that, more than likely he'd save himself and leave everyone else to rot.
Now if you look up Uluru, there is a rock formation in Australia named Uluru and there's an interesting legend about it.
http://en.wikipedia.org/wiki/Uluru
"Another myth recounts that two tribes of ancestral spirits were invited to a feast, but were distracted by the beautiful Sleepy Lizard Women and did not show up. In response, the angry hosts sang evil into a mud sculpture that came to life as the
dingo. There followed a great battle, which ended in the deaths of the leaders of both tribes.
The earth itself rose up in grief at the bloodshed — this is Uluru."
So the earth itself rose up in response to a great battle. Well they are setting up quite a battle on Heroes that could potentially lead to the deaths of millions via the explosion. Just something to think about. Perhaps the Uluru picture applies to the aftermath of the explosion.
And no I'm not suggesting the Earth actually rises up. But maybe Uluru is the rest of humanity reacting to the people with powers after the explosion. Angry at them, blaming them, and then there is a hero standing there facing them trying to get them to understand that people with powers can help.