I'm sorry, does it hurt that much?

I seriously doubt there is any kind of proper expansion (new retail box) coming out anytime soon (within a year and a half). Sorry. In fact, IF there was an announcement about an expansion I would be severely hurt by Square-Enix's lack of judgement. Mainly because:

1) We are not even finished with the current %$#@ing story-line (Yes, usually one story finishes and a new story is introduced via expansion, in case you are unfamiliar with how MMOs typically work)

2) I would hope the Grand Company would come to a close as well (Since yes, while story-line Alpha (Main Quests) kind of coexists with Story-line Beta (Grand Company) they are two different stories, and as one is with the Adventurer's Guild/Echo people and the other is a War time Grand Company)

To start another story-line is as far fetched and ridiculous as your counter-argument good sir.