that's not how it works. No matter how many people tune in for the SB (or don't), it has no immediate impact on revenue for the NFL--that game was paid for by CBS a while ago.
Also, the matchups hardly matter:
Tampa (small market in a college football state) vs KC (tiny market other than hate watchers nationally) had over 100 million total viewers.
NE vs Atlanta (zero national fanbase, mediocre local fanbase) had the most ever--126 million.
In fact nearly every other game got at least 110 million. It doesn't matter.