Hopefully in the story, or sidequest, or a dlc I don't care which we get to find out who built the exo. Maybe a counter force anpgainst the Vex? A weaponized ghost companion? Souls of those returned from the void?
Well I hope we get to go into an exo plant or something. Did any of u play the game dragon age origins. there was a dlc were u got an extra tag along in ur journeys and u get to se were the golem came from I think this could be like a bases from which we have a great adventure into the past.