a Shelby autograph on a Shelby Cobra is expected.... what autograph would you expect on a DeLorean?

How about Steven Spielberg's?

Making the DeLorean famous was something that only the Back to the Future movie trilogy was responsible for, and Spielberg was the Exec Producer.

So, Ernest Cline, author of Ready Player One, written in 2011, and which will be released in March 2018 brought the glovebox door to Spielberg and got his autograph on it. The only DeLorean he has ever autographed.

In the above images you see the Back to the Future DeLorean, and Christine, in a race of 80s pop culture cars, and among the many cars in the race scene is the Batmobile. Below is the preview, and it's full of cool cars and characters, from the 80s movies.

in the above screen grabs you can see Christine, and the A Team van

and Mad Max's Falcon and below is the original Big Foot