That's two different things. First our universe is bigger then our observable universe, as some parts of our universe has escaped due to higher speed of expansion then the speed of light. This means that outside of our observable universe there is still "our" universe, we can't just communicate with it, and thus should have the same properties.
The other issue is whether is there anything outside of our universe and whether it has to have same properties as our universe. This question is about "where" happened the big bang and what has cause it and more why the whole universe has exact properties that allowed for us to be here. This is more philosophical question and as it was said before has many issues, but physics has made some theories that tackles it and some of more promising models (i.e. inflation models as I pointed before) suggest that there might be thousand of universes, each with each own big bang that started it and different properties which "collapse" to their values during big bang (probably on random)
As far as I can tell, this rant has no connection to what I was talking about at all.
What I was talking about may or may not have been off topic, but the above seems to have no connection to anything.
The end of what Son? The story? There is no end. There's just the point where the storytellers stop talking.