Jimmy Kimmel and Mindy Kaling star in a teaser for Doritos' upcoming Super Bowl spot that leaves viewers wondering: Who is #FlatMatthew?

Frito-Lay confirmed earlier this week that Doritos would return to the Super Bowl with a spot promoting Doritos 3D Crunch and is now offering crumbs of information about the plot. 

In the teaser released today, Kimmel and Kaling appear to be chatting during a break in his talk show before another guest is slated to appear.

“He’s got a new look,” Kimmel tells Kaling of the guest, who isn’t shown. “Like a look that no one’s ever had before.”

Kaling then theoretically sees the guest offscreen, uttering “holy —.”  Just as the viewer expects to hear a certain word, the hashtag #FlatMatthew appears on the screen.

Doritos didn’t confirm who #FlatMatthew might be. Fans of “Jimmy Kimmel Live” are likely to guess it is his longtime fake feud buddy, Matt Damon.

Kaling appeared in a 2015 Super Bowl spot for Nationwide in which Damon also made an appearance. Damon returned to the Big Game three years later in a spot for Stella Artois. 

Doritos hasn’t yet said whether Kimmel and Kaling appear in the actual Super Bowl spot, which agency is behind the project, the length of the in-game ad or when it will air during the game.

Sibling brand Cheetos has Ashton Kutcher and “more talent” in its spot, Frito-Lay announced Thursday when it released that brand’s teaser. 

Doritos 3D debuted in a 1998 Super Bowl spot starring Ali Landry and also featuring Sean Hayes. Landry has recently been promoting Doritos 3D Crunch, which debuted at the end of December.

Join Ad Age on Feb. 2 for a look at how brands are navigating the pandemic and addressing diversity in their ads for the 2021 game.