You don't create a world that rich (apparently as I've not played the game yet) without intending to make a series of games in the same setting. The main question will be to continue with Aloy being the lead (a la Drake in Uncharted and shepard in Mass effect 1-3) or to explore the stories of different people (similar to Dragon Age (and Elder Scrolls?) with a different protagonist in every game, albeit connected to one epic story arc)
It's a great big world, so at some point they are going to have to move on from Aloy's own view and experience. But I suppose one can also look at LoZ and the fact that Link's world is huge and the games are still showing everyone that world through his personal lens.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix
