some strange idea pop in my head would it be weird if the next FF game FF 16 was mech base and had a mech base story line ? you know like Gundam.
I can see that. I dislike mecha anime, but the concept adapts really great in videogame format (different robots, pieces, upgrades, constantly different bosses...). Zone of the Enders 2 is amazing and seeing a AAA focused on that could be amazing.
But the mecha culture isn't established outside Japan, i doubt SE wants to limit their market with a niche premise.
Also FFXIII has mecha as their summons and you can ride them. Also is a constant theme of the lore.
So, we already have that, only it's not on the nose.