Unfortunately I still haven't managed to track down a hardcopy of the Batman & Robin Style Guide however there are lots of images online. I've pulled together as much as I can find.
These are mostly illustrations by José Luis García-López depicting the various characters from the film. His beautiful line work really works well and lets us see the characters/designs in a fresh light. These were all used in a variety of Batman & Robin merchandise.
Another audio adventure tied in to the Batman & Robin movie was Batgirl: To Dare The Darkness.
Written by Batman comic book regular Doug Moench and starring the movie version of the character Barbara Wilson. The story is set just after the movie and sees the character go on a solo adventure against Black Mask.
This was originally published as a short paperback in 1997 and aimed at kids/teenagers (it's only 122 pages). Unfortunately an adaptation was not made of the other spin off novel Robin: Facing the Enemy by Alan Grant.
Anyway, this is an interesting curiosity being one of the only stories to feature the Barbara Wilson character and worth a listen. I don't have the cast list for this but the voice actress does a great Alicia Silverstone impersonation.
