Super Bowl commercials: Steven Tyler, Emerson Fittipaldi, Keanu Reeves and more

Sunday is Super Bowl LII, which means America will immerse itself in high-calorie potluck fare, garish halftime-show entertainment (Justin Timberlake, bringing sexy back, but not that kind), the most expensive and over-the-top TV ads of the year, and — oh yeah — a football game between two teams connected by Amtrak’s Northeast Corridor line.