Thanks! I mean he did something similar in the comics so why not do it in the movies?? Go find a nice snow covered mountain and hollow out a nice deep cavern way up there to the point where a human would need an oxygen tank to breath. And he can use scraps from the ships and possibly the World Engine to rebuild the Fortress and he can store Kryptonian artifacts like collected weapons and stuff because we know that the military has collected some of the Kryptonian weaponry. Bruce Wayne could get his hands on them and then return them to Clark....after he has researched them of course! There are many scenarios they could explore