I may be wrong, but isn't the A5 a 4-door sedan? that would render it illegal to race in GT2. As for the other 2, I do see R8 more then I do the TT being developed for GT2. As for Aston Martin going LMP1, I'm not so surprised to hear that happening if its true. I'm thinking the Lola-Aston Martin may have been engine experamentation in the LMP1 class as Acura kind of did the same thing with the Andretti Green Racing and Highcroft Racing developing the ARX-01a chassis while the Fernandez Racing Did engine development in ironically a Lola.