He's not a top back-up by any stretch of the imagination but IMO one of the goalies to be in a potentially great situation is Yann Danis. It happened to Scott Clemmenson last season and it could be Danis' turn at the 'kick at the can' this season.
Brodeur is no spring chicken. One long term injury to Marty and Danis will have his chance to shine. With Lemaire's defensive system, I can't see why Danis' numbers wouldn't be fairly good.
For what it's worth, I can picture Lou Lamoriello going out to get another goalie IF Brodeur were to go down long term. Giguere or Biron might be candidates to take over as starting goalies for New Jersey if Brodeur were to go down for the season.