Would appear the real battle is on SAU!
Either way, my money is on the Toyota, they haven't had a proper sports car of any description in ages. Their involvement in F1 would make me feel there is a customer base there they want to target. I would assume there would be a toyota version, and a lexus version. Might try a simliar set up to ferrari and mazarati, or Aston and Jag. Toyota will be the fast one, the Lexus will be the nice comfy one, thats a tad slower. I dont know tho, Im not Toyotas marketing manager. But I feel they would be keener to win, and they DEFINATELY have the most money.
I think Nissan might have done a Sega to be honest.