Have you seen the previews of upcoming Superbowl ads on television. They are being promoted more than the game. Here's a couple more that are out now.For years, Super Bowl commercials were closely guarded secrets until they aired on the biggest ratings day of the year. These days, companies have discovered that teasing them online in advance of the big day is a more efficient way of getting their brand message in front of the masses.Take a look.

Coke-Chase Superbowl ad

Audi big game ad