I really, really hope that this is truly the last Dark Souls game. It's good and everything but still not as good as the first. 2 and 3 were never meant to exist since Miyazaki intended for Dark Souls to be a standalone game with no sequel. That's why we had two endings for 1; what happened after either ending was meant to be left for our imagination but when the disgusting pile of shit that is Dark Souls 2 came out, which Miyazaki never wanted, it took away a bit of the magic that Dark Souls had in its story and ending.
All fires no matter how strong, will eventually fade; that was the theme of Dark Souls 1 and it was supposed to end with Dark Souls 1. 2 just ignores that and assumes that you linked the fire in 1; all Dark Souls 2 ever was, was Bandai Namco's way of getting more money by taking advantage of a successful title. What Dark Souls 3 is, in my opinion, is Miyazaki's way of fixing the things Dark Souls 2 fucked up, since the actual existance of 2 completely fucks up the endings he had for the first.
Linking the fire in Dark Souls 1 was considered the bad ending, because all you were doing was fuelling a fire that is eventually going to fade, you're prolonging the age of fire which is supposed to end; the good ending was becoming a Dark Lord and ushering in an age of darkness, a new age, an age of man, giving way for new things, a new era.
What are the endings in Dark Souls 3? You either link the fire; end the age of fire with the firekeeper or become a Dark Lord, last two basically being the same endings so in the end, there are truly only two; you either prolong the age of fire or you finally end it. Sound familiar? Yeah, because it's the same fucking shit from Dark Souls 1. Main story-wise, there is nothing new in Dark Souls 3; what it is, is a fix to the great lore of Dark Souls 1 that was fucked up by Dark Souls 2. This is how Dark Souls is meant to end; with no definitive conclusion, an ending that is left to the player's imagination.
If Bandai Namco decide that they want to force Fromsoft into making another Dark Souls game like they did with Dark Souls 2, then I'll be incredibly disappointed. They should finally stick with the theme of the game and let Dark Souls die like Miyazaki intended when Dark Souls 1 was made; Dark Souls 1 remains as one of my most favourite games of all time but each sequel that releases scratches away the beauty of the game bit by bit. Dark Souls 1 is still miles better than either 2 or 3 because it made a world, it's own world, it's own lore. Dark Souls 1 is it's own game while 2 and 3 aren't; they rely on the previous lore and a world that has already been created by a game that was never meant to have a sequel. Honestly, if I were to ever recommend someone to play Dark Souls, I would tell them to play the first and only the first. One of the great things about Fromsoft's games is how good they are at creating a completely new world with its own unique lore; sequels should never be a thing. Make another game set in a new world, with new lore; they did it with Bloodborne and the game was successful so surely they can do it again.