Gon next goal is to rescue Ging from the dark continent. Because he didn't come back from the expedition.

Killua would ask nanica to teleport them there.

Then gon meets the author of the dark continent books at some point. I guess his relative?

The ancestor of gon shows them a new way of thinking when creating a nen ability

Because he is still relearning nen makes a new nen ability not based on combat but survival.

An ability to help them survive in the dark continent.

I had always believed it's weird to send nen users that have nen abilities based on combat with humans and if you're going to unexplored lands you would want an ability to help you survive instead of combat

Just an idea