subgenre of horror or action?
who knows with a director of that calibre!!!
I'd say a failed horror.
Oh and honestly, Die Hard 3 is a better movie than Die Hard 2. it was very different, its very repeatable since its a good film to watch, etc. I think die hard 4 is going to be a crappy version of Die Hard 3, kinda like die hard 2 was a crappy version of Die Hard... we'll see though.
"we got smoke! we got smoke in here..."
... Samuel L. Jackson, remarking subtly on the presence of smoke.