The first "commercial" we see is a '50s-style toaster commercial, complete with the "retro housewife" demonstrating how to use it. It's the last few seconds of the commercial, however, that make it clear this is something much more significant. As the toaster finishes cooking, there's a series of increasingly rapid beeps that will be familiar to any Marvel fan: it's the same repulsor sounds that we know from Iron Man's suit and other tech. Just to drive that connection home, the ad reveals that the "toaster" is made by Stark Industries.
Although Tony Stark and Wanda were both Avengers, her connection to Stark goes back much further than that. In Wanda's first appearance, back in Avengers: Age of Ultron, we learn that a Stark-made bomb was responsible for killing her parents many years ago; in fact, it's a desire to get revenge on Tony that leads her and her brother to briefly team up with Ultron.