V-r0cK on 02 June 2016
Naughty Dog stating that this was their last Uncharted game, they were smart to introduce Cassie.
Because they kind of put it out there that if Sony wanted to make another Uncharted game they may have to use Cassie since Nathan is old and retired, leaving all the Nathan Drakes game untouched incase future Uncharted game/spin off games doesn't live up to the originals.
But yes I think Naughty Dog is done with the franchise.
