I don't think it is correct to think that because only NYG, GB, and SEAT are left in NFC it means that one of them will be the NFC representative in the Super Bowl. Just that they are the only NFC teams left which currently still qualify as a super bowl WINNER under Lou's system.
So...you are not really getting an edge if you rush off to put futures bets on, say, SEAT to get to the Super Bowl. Lou's system nothing about who GETS to the super bowl ('cept for the winner). If Seattle is eliminated next week, they still could be the NFC rep in SB. So could Minn be the NFC rep in SB -- Lou's system just says that they won't win IF they get there.
Personally, I kind of like this suspense. A bit like an Agatha Christie novel, but with fewer hints or details. Every week, we see another "character" knocked off, and the list of "suspects" gets smaller. And we all keep trying to guess who is the next to go.