"Die Hard 5" has a John McClane JR.

Jai Courtney is set to play John McClane JR in the fifth instalment of one of if not the greatest Action film franchise in history. Don't worry if you've never heard the name or recognise him from the picture because I sure as heck didn't, so here's a little background on our soon to be big time hero. Jai courtney is an Australian actor most commonly known for his role as Varro in the highly rated "Spartacus: Blood And Sand" he appeared in 10 episodes other than that he has had guest roles in "Packed To The Rafters" and "All Saints" and will also star along side Tome Cruise in "One Shot" next year. Below is a picture of Jai along side John McClane himself during his screen test for the film.
All that is know about the plot of "A Good Day To Die Hard" is that McClane and his son will be taking on the local criminals in Russia and that Patrick Stewart (Professor X X-Men 1-4) is rumoured to play the main villain.