The "big flush" myth is false. Our wastewater system isn't full at Super Bowl halftime because it takes a while for what you flush to reach our facilities.
Are you anticipating a different lineup (to your bathroom) during halftime? Make sure everything runs smoothly by practicing proper disposal at home. Wipes (even those labeled and marketed as "disposable") grease from cooking and other clog-causing items belong in the trash, not the toilet.