If you're a Facebook person this is well worth your time checking out. There's some very cool rare illustrations and promotional photos that get posted there.
The jewel in the crown though is the 1:1 replica of the Sonar Cowl with light up eyes and Kilmer mouth! There's a step by step photo of the work involved and it looks incredible.
Here's a link to the page:-
There's also an instagram page too:-
If any other Batman Forever sites want a shout out, please let me know. It would be great to pool our resources where possible.