Getting back to 2010... Here's my guess - works Honda/Dynamics and Volvo/888 efforts. As I understand it the Honda thing was about as close as you can get to a done deal last year before the world went mad, and given Honda's continued close involvement with TD this year and their big presence at Silverstone I don't think it's too much of a stretch.
As for 888/Volvo - the word I hear is that 888 had "guests" at Silverstone, and there may be a show car at The Rock this weekend. All speculation of course, and based on sources that have a hit and miss record, but Honda vs Volvo next year? Could be fun