You can't subtract the two years because 1967 wasn't year "zero" but year "1". You'll always end up one short. Unlike figuring someone's age, which starts with the "zero" birthday, this starts with #1.
The reason Wiki lists the next 4 Super Bowls is to show which league is the home team and where the game will be played (though 2024 hasn't be finalized).
I know you're upset the Pat's didn't win, but if you'll just count them on your fingers you'll find there have actually been 55.
BTB. The flyover which was a big deal and CBS only gave perfunctory coverage, had a B1, a B2 and a B52 flying together. Add up the numbers and it equals......?
A friend of mine only saw 2 planes. I told him it was okay, the third one was a stealth bomber which is why he missed it.