They did it for FFXI, so we can't have it sorry!

Seriously though, the fact they did it for their last FF MMO means there's a good chance they will for XIV if it gets off the ground and has as much story depth and lore as XI did, since as of right now, XIV is very hollow in terms of story and lore given it's circumstances. It's there but it's not really..full of substance or lead you to want to find out more and more like how in XI you heard about this "Crystal War" and various backstories to everything that existed and you wanted to learn more about the era that came before "the adventurers", thus the lore book release.