Hello Eorzeans! I'm very excited for the upcoming Return to Ivalice storyline. While we can certainly expect flashy and mechanically intensive raid bosses, I'm here instead to speculate on the plot of the adventure. I have a special place in my heart for Ivalice, starting from Final Fantasy Tactics Advance before moving back to the original FF Tactics as well as other games. To that end, I have some speculations on how the story will go, where it will take place, and more! I'd love to have some help supplementing my ideas with other plot details, bosses, and more! Let the speculation frenzy begin!
The Storyline will take place in Rabanstre:
In the lorebook, Dalmasca is presented as an Othardian territory that was subjugated by the Garleans. Rabanastre is specifically stated as their capital city that was bombed heavily by the Garlean airships. This is a logical location for a raid tier, as it would be an immediately striking environment. Additionally, it would also have some thematic similarities to Doma and Ala Migho, which clearly show the damage that the war has caused for their people. Additionally, having it take place in a ruined city allows them to ignore having to have large amounts of NPCs around, and lets us play adventurer without worrying about the general citizenry much. Additionally, the city having been destroyed could lead to a situation like Vagrant Story, with various factions trying to explore and exploit them.
...But not Dalmasca:
Dalmsasca will be important to the storyline, but players will not travel much outside of the destroyed city itself. Although I might be wrong about this, I've never heard of a patch adding a full open world zone, which would probably be necessary to support Dalmasca. I could definitely see us getting a 'home base' style area in the city similar to the Redbill base or our little camp in the Deltascape. That being said, the people of Dalmasca will certainly come up in the story, seeing how they relate/react to the events as well as probably having prominent NPCs from the region.
Adventure Archeology!:
What we know of the storyline (which SE has reasonably kept rather limited) relates it directly to the legend of Delita and Ramza, and the plot of Final Fantasy Tactics (War of the Lions). I imagine our characters will have been lead there by the Doman shinobi explicitly sent to other regions at the end of Stormblood. They would see a chance to find great knowledge in the ruins to go there and capture it. Since many players would wonder about the utility of finding knowledge and stories alone, there will probably be some sort of powerful artifact, secret, or other Mcguffin that an evil faction desires.
...and some Old Friends:
I believe that, fitting with Stormblood, the primary human antagonists will be the Garlean Empire. I don't necessarily see them being the only targets of our Raid shenanigans, but instead serving a similar role to the Nazis in Indiana Jones films. They will probably be the ones unleashing ancient evils on accident, or merely hounding the characters in their attempts to explore the ruins. I don't know if it would be another legion and legatus, or merely some prominent commander in the XII. Given the nonnumerical themes with their respective FF games, it would be fine enough to use the XII, possibly having them desperate after the fall of Xenos, Doma, and Ala Migho. Why are the Garleans there of course? There are reasons for that below...
Finding the Truth:
While the full plot of FF Tactics is a bit too complex for a raid storyline, there are certain aspects that can definitely be included. It's already been mentioned that the story of Ramza and Delita is a Garlean Legend, and that relates to an important part of the premise of FF Tactics. The framing device of Final Fantasy Tactics is that of a scholar investigating the story, and finding conclusions contrary to the narrative pushed by the Church and Traditional academia. In the Church telling of the story, there were no demonic cults or magic, and most importantly Delita is the hero of the tale, not Ramza. I believe that they already mentioned in passing that the Garleans see it as a story of a peasant rising up to greatness, which would be both better to their values and fit this narrative. As a result, I see this as the narrative that the Garleans are pushing, possibly using it as propaganda for their treatment of the Dalmascans. However, as we all know, Ramza is the real hero of the War of the Lions, a vagabond and rogue that saved the world. That being said, this wouldn't fit the Garlean's pretty little narrative about gaining power through service, so they would have quashed this interpretation. Exploring Rabanastre, however, will bring many of these truths to light.
Viva la Revolution?
I'm already guessing that there will be some sort of other threat or issue within the city that needs to be dealt with, probably one that the Garleans will try and exploit. Naturally, through the cleverness and desperate battles of the heroes everything will be alright though, and the Garleans will be defeated. I'm also guessing that the true knowledge will be let out to the public, bringing them one step towards revolution against the Garlean Empire.
So that's some of the more major speculations that I'm guessing for the storyline, I'd love to hear other opinions and ideas though! Either way I'm very much looking forward to the Raids and their associated storyline, and hope that it turns out well.