Porsche has not ruled out signing Webber as Le Mans driver
Ferrari won nine constructors titles at the 24 Hours of Le Mans.
'He's a hard charger, he's intelligent, he's a thinker, he's a nice person, he'd be good in the paddock' - Allan McNish
Bruno Senna has options for Indy, stock-car and NASCAR
Mercedes already has cars that compete in GT and endurance series and question is will they built a prototype for Le Mans in the future? IndyCar entry would probably be Mercedes engines if they do elect to go that route.
KC Motorsport Group has been active in Formula 3 and recently received their Morgan chassis for their Asian Le Mans Series entry. Paul Ip's team has received an entry for the 2013 24 Hours of Le Mans.