Ivalice has its own team and its own lore, not to mention the fact that all the previous titles carry over unto the new title as history, destruction, or a political power shift. Ivalice prides itself on remaining consistent an MMO is not consistent, and nothing could be gained history wise from and Ivalice MMO to be uses in another Ivalice setting.

its more like that EA will buy out squareenix after they go bankrupt, before you see and Ivalice MMO.