Titan Goons At The End *spoilers for those who haven't played it yet*
Before the final boss fight, you have to fight off 2 titan goons who were obviously guards. Would it have been better if one of them was Cash? It would make sense because after you beat Joker, they show Cash on a stretcher(which is kind of strange because you last left him, Franklin, and the orderly in the mansion safe and sound). And Gordon did mention that the titan stuff wears off.
Donny! We got a German here who wants to die for country. Oblige him.