A 16GB update on day one!?!

I bought the game this morning and after bringing it home and putting in to the XBox One, I am informed that I need a 16GB!! update? WTF? I looked around the internet a bit and didnt see anyone else mention an update this large. Other people are mentioning a 3.3GB update but I seem to be the only one that needs 16GB? What up with that? Can someone tell me what is going on? Why do I have a 16GB update?

8.31 gb on ps4!

We actually had to download stuff that was not added to our discs, for whatever reason.