The Super Bowl fly over was kind of random. My son said it was f18s, f35s, and f15s. I was able to make out the two b1bs. It was like the air force forgot about the flyover and just scrambled whatever was on the closest tarmac.
They had several days in advance of training together. It was all planned in advanced.
https://www.af.mil/News/Article-Display/Article/4384084/air-...
Given your description, its good to see the USAAF are clearly on the ball when it comes to security. If, say, all your B1s overflew the nutjob bowl then certain planners across the world might decide to act in a certain way. A random assortment leaves everyone guessing.
This seemed like a standard flyover. What struck you about it being random?
Caveat: A non-trivial number of air assets are currently stationed or assigned on the other side of the world right now.
Citation: I used to be involved with flyovers.
The soldier recognition events are actually paid advertisements by the US military. I think flyovers are too?