This was an interview on IGN that featured Kitase and Arakawa of SE back in May 09. They speak about Dissidia and bit about XIII but its the other things that get asked that are really intriguing.
Final Fantasy Reader Q&A - PlayStation 3 feature - at IGN
For those who can't be bothered to read, here's a rundown:
No plans for a remake of FFV and VI though they are under "consideration"
With the release of FFVII:ACC, the Compilation of VII is considered over unless someone comes up with a new idea they want to play with.
Arakawa really wants to make a sequel to FF IX.
They also dodge a question about a new FFMMO but we already know now about FFXIV.
Any thoughts?