We do know the answer, however: because pace car. The pre-race festivities for the 2012 Toyota Grand Prix Of Long Beach are already underway, among them the unveiling of the new Scion FR-S Speedster by Cartel Customs.
So, aside from the needlessly coy question, it's pretty clear that Toyota/Lexus will have two prepped cars there this weekend--and more for the celebrity event, which will see a bunch of tweaked and tuned supercharged Scion tCs take to the track.