Why'd they change the DVD title?!

Just curious...this is an action movie, but it's a Christmas action movie! Maybe just in case they want to do a sequel, then it wouldn't have to be Christmas-oriented. If they kept "Christmas Rush", they'd have to keep it that way. So they changed it so they could do as many sequels with as many settings as they wish.

Now that I thought of it, maybe "Die Hard" had a Christmasy-title to it until they thought of the sequel-possibilities...?