Your students are going to come back to class on Monday with lots of opinions about the game, the half-time show, and the commercials. Why not direct that energy towards analyzing primary sources?
Vintage advertisements are a great introduction to primary source analysis because students see advertisements every day. Reviewing some of the main techniques advertisers have used for hundreds of years is a great way to transition from discussing your favorite Super Bowl commercials to doing in-depth analysis of advertisements from whatever time period you are studying in class.