I don't buy it that mcvay is holding out. While it may be plausible and some of us may assume that don't show all your cards if not needed. But there isn't a reason to not run your offense because your afraid to show something on film. I beg to differ you want to put as much film out as you can to make teams try and prepare for everything. I thought over the years mcvay was holding back and he was going to pull out this insane trick play or offensive masterpiece and it's never came to life. There was no bigger stage than the Superbowl to pull off some gadget trick play or new offensive formations and plays and they never came out.