Batman meets Supercar?
In DC comics Batman Adventures comic 13 "A BIRD IN THE HAND" from June 2004, there is a Supercar toy on the child's bedroom floor in the second story "Night Light".
Why? as before Batman arrives to kill the monster in his wardrobe he is clutching a Superman toy did Superman and Supercar get put together or is one of the people involved in the comic a secret Supercar fan? See below for a better view. 

For another twist in the Batman meets Supercar 
story see below.
Steve Annear from New Zealand recently contacted me with some photographs of an old Supercar ride he owned that had been converted into a Batman one, see below.  

Steve may be selling it, so if you are interested drop me a line and I will pass on your details to him.