Too similar to Die Hard?
There are countless parallels to the original Die Hard.
Terrorists take control of a building, take numerous hostages, try to obtain codes, their true intentions are unknown. A lonely not-supposed-to-be-there smooth-talking renegade hero who single handedly takes down most of the terrorists, knows one of the hostages personally and is in constant radio contact with both the terrorists and the officials on the outside. The diversions, the way the terrorists have a secret powerful weapon to deal with the navy seals / swat, the traitor etc...
Sure, you could call it a homage and admittedly it's an entertaining flick.
Still, do you think it is too similar to the classic?