They are making a bunch more games right now. That's why.
Final Fantasy 7 is without a doubt the biggest thing Square Enix have. Easily.
There WILL be a Remake, the question is... When?
Little something from Wiki-
"As for a VII remake, all I can advise right now is to play the PSN release that just came out for the time being. Maybe, perhaps we'll have some news for you at a later time. I'm actually working on multiple projects right now, I don't know exactly what new projects I'll be taking on after XIII, but I am working on Final Fantasy Agito XIII as well, so maybe I'll be able to focus a little bit more on that project once XIII is complete"
They keep hinting at it, they have a bunch of scenes they could use from Advent Children for the cutscenes. They have the story there, the engine... Everything is in place.
