Deion Sanders might be a fun one to watch with all of his antics on and off the field and with him being a multi sport athlete would probably be one people would want to watch. They did one with Bo Jackson already but doing one with Brady a few years after his retirement could be pretty good too. You could do one with the Cowboys of the late 80's to mid 90's too if they could do some research on some of the stuff that was covered up for them during that time.