I can honestly say that if I were sitting across from Bruce Willis in an interview these days, the last thing that would cross my mind would be asking him if he's going to be making another "Die Hard" film.
Maybe I misread the general reaction to the last film in the "Die Hard" series. Maybe there are people out there saying to themselves right now, "I wonder what happened to John McClane after he fought that jet airplane bare-handed and saved the universe from the Internet," but if so, I've never met one of them. Maybe there are hardcore fans who are already angrily logging in to HitFix so they can respond, "Mr. McWeeny, you are simply not cool enough to appreciate a PG-13 'Die Hard' movie, so go FORK yourself." Maybe.
Personally, I like to imagine an alternate reality where the producers of the original "Die Hard" realize that the charm of the film hinges largely on the idea of John McClane being a very average guy who finds himself in one-time-only circumstances much larger than him, and who survives just barely, and as a result, they decided to never make a sequel because they know it would just be stupid to do so. I like to imagine that reality, and when I look at my own DVD collection, that is indeed the reality it reflects.
There are no "Die Hard" sequels in this dojo.