Pretty sure the eye design and goggles will tie in with the mystery surrounding Louisoix and Bahamut. After all, Louisoix's full [Japanese and English] name is 'Louisoix Leveilleur', and French word 'veilleur' translates into 'watchman'. As someone said before, the remaining members of the Circle could either be looking for Louisoix or taking over his duty as watchmen of Eorzea.