The Ravens game was a national game.
The Saints/Broncos game was already the C game on CBS BEFORE Denver had their QBs removed.
The networks are gonna want a full Saints team. If they ask for the Saints on Sunday, the network will get it.
The flipside of that is if there's any uncertainty about the Saints being full go for the Sunday game the networks may decide not to risk it. If the Saints end up only being down Kamara and win in the wildcard then they'll be seen as one of the favorites for the NFCCG and the networks can make their money back in the divisional and championship rounds.