They can never do that just because of Vegas. You pay all the people betting on the Rams and they are gone. Then the Saints overcome the spread and they have to pay the people betting on the Saints. If the NFL wants to stop gambling on their sport this would do it. .
After Further Review... Unless I missed something, these people are still in it.
Since the idea was picking the winner and the tiwbreaker was picking the loser only FAN AND BAN picked LA over NE. Since nobody picked NE over LA anyone picking NE is still in it and the tiebreaker will be the score of the winner.