They kept Gilgamesh as a pirate in 11 when I first saw this guy

I thought it was gonna be a showdown with Gilgamesh but its just a monster from another dimension. Which alternate dimensions ended up becoming 11's pet peeve for some reason But yeah your not alone Gilgamesh has been mentioned as a wanted battle before. If and when they do introduce a battle with him I hope they hint at this Gilgamesh being the same Gilgamesh in all the other Final Fantasy games excluding 11.