Apparently, there must!
Bruce Willis is boosting that the script for the next installment of Die Hard is slowly but surely coming to completion. While out promoting his latest flick Red, Bruce told sources that Die Hard 5 will "probably" start shooting next year. He explains:
"We have a script. They're making a couple changes right now."
Fantastic. We'll look out for the next installment of Rocky to come shortly after that. Then another Mad Max. Then maybe they'll make another Jurassic Park just for kicks!
Wait, actually, we wouldn't mind that so much. Can we trade in the others for another Jurassic flick?!