You might want to check out this interview at Batman Online with Janet Scott Batchler. Ben Yip (that guy who made those BF novelazation posts you like) confronts her about Burton's actual involvement. He was in no way the primary hands-on producer. He really shouldn't even receive credit, like Sam Hamm on Returns. The studio just wants names associated with previous successes to entice potential customers. Burton receives top billing because nobody knows who the hell Peter MacGregor-Scott is.
MEETING TIM BURTON Needless to say, there's been massive speculation around the Internet on how much involvement Tim Burton may have had in the third Batman film.
The truth is that Burton was only around to approve his creative successors. After approving Joel Schumacher to take over as the director, Burton met with the Batchlers, who agreed with him that "the key element to Batman is his duality. And it's not just that Batman is Bruce Wayne. All the villains also have secret identities. Superman may be Clark Kent, but Lois Lane is always Lois Lane and Lex Luthor is always Lex Luthor.
And when we said that, Tim just kinda went, 'Yes!' And at that point, we pretty much had the job."
Tim Burton would go on to make Ed Wood as the Batchlers began work with Joel Schumacher.
Firstly, thanks for your invitation to this wiki. I've added a bit where I can. I was wondering if your wiki could affiliate with my two wiki's about the DC Cinematic Universe (with the new upcoming Batman films) and Batman: The Animated Series. There is also a wiki about the Dark Knight trilogy which I would suggest affiliating with as well. With any luck, being promoted by other wiki's will get you new users and more contributions here.