I don't know what your feet are like and whether or not Heidi would be interested, but some of these ideas about 3 teams going 15-1 or better are ridiculous.
We're at the halfway point. Denver and NE play each other. Denver and Cincy play each other. All three have divisional games, road games, etc.
The likelihood of a DEN/NE unbeaten showdown is only 33%, and that's coming up in a few weeks. 2004 saw two teams at 14-2 or better and that was pretty crazy. While something like that is possible again, the odds of there being THREE teams at 15-1 or better are almost zero.