We have know about the new client for months now, but to answer your question, all subscribers get a free download of the ARR client, any new players, yes they will need to buy new disks.
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That article don't speak a lot of ARR , it just says that they are remaking the game because it's was really bad( which is quite old news ) , that the autor love FFVII ( seriously he compares Nael ,that looks like an ivalice judge, to Sephiroth ! ) , and resume the story of 1.0 ( well forgeting about primals that's not related to the meteor , too different from FFVII ... ).
That's not the same thing at all , Nael wants to destroy the gods ( which is quite the same thing in FF XII ) .And Sephiroth talks like that to Jenova ? Except when he took his head , but he was totally mad , Nael kinda praise Dalamud's destruction powers .
it'll be funny if nael comes back as a super being that looks like sephiroth
Just as Sephiroth praises Jenova's power, the similarities are there and are easy to see, it just takes a bit of thought to see them, I didn't at first but after that article I did see them.
Oh and in FFXII Achadia just wants to expand their empire and is bent on world domination, which is what the Garlean empire is trying to do, however Van Darnus is bend on using Dalamud to destroy the world, which is why the black wolf wants us to kill him and stop Dalamud, because you cannot rule what doesn't exist, its also why he never stopped us.
anyway, the problem is that the author only speaks of FF7 all the time ...