It's amazing how much info there can be about the original MK1/Mk2 after all these years. I was just listening to the Kotaku Talk Radio episode about Tony Hawk Ride (being put together for Activision by Josh Tsui's company, Robomodo). In it, besides the new Tony Hawk game, Josh talks about his history in arcade games, specifically in Midway's Chicago Studio. He just happens to mention that he was the face of Sub-Zero in his MKII ending. Check it out:

Kotaku Talk Radio - Tony Hawk Ride
Kotaku Talk Radio - Tony Hawk Ride RSS (You can download the .mp3 file here