^But it's a prison that he designed, which comes straight from Prison Break.
He didn't design it. Stallone plays a break out artist who gets put in prisons, breaks out of them, then reports on the flaws. The prison that he is currently in is designed off of his notes. So in a way you could say he designed it, but only indirectly.
Anyways, Stallone and Schawrzenegger in a movie together? Hell yes I'm there!