Well depends on which SE deems necessary considering Ala Mhigo is the last location in the Continent of Aldenard.
http://www.ffxivinfo.com/images/maps...aps-eorzea.jpg
Only way into Sharlayan currently is by traveling using a Boat but as the story goes on with Sharlayan it seems like something bad may happen to it that may wipe it out from the face of the planet considering what happened in 2.X when a good part of Sharlayan was basicalled "Nuked" due to something they did. Though I would not be surprised if they combine both Sharlayan and Garlean Empire considering how small the Garlean Empire map is on the current Map. Maybe set up a good chunck of the Capital of the Garlean Empire as the Final Dungeon for 5.0 with the final Dungeon being the Main Castle where the Emperor is while setting up Sharlayan as the Main battle ground for the War in 5.0 and then as the story progress we see the Garleans Being push back into the Garlean Empire thus begins the final part of 5.0 being a invasion into the Garlean's Capital City.
it would give 5.X a good setup to explore what becomes of the Garlean Empire and Sharlayan since both sides took the majority of the damage from the War along with tension between two City States and the consequence of winning and losing a war.
