If he knows it's going to fail, he should consider putting a death ray on a militarized Model S with bullet proof windows. Maybe with optional retractable VTOL (Tesla's last patent) side lifters. He could probably sell it to the US government and save Tesla.

I'm sure that Bruce Wayne would buy one, maybe two.

I thought the minimum order to disguise the purchase was 10,000?

(Obscure Batman Begins reference)