The thing is, according the the source, they are still highly interested in putting them together in a movie down the road. The quote above is from Batman On Film, and he got it from
here.
So if true, it's going to happen. Question is, should it?
The only way I think I would like to see this develope is if they worked together against something. Of course, developing their initial dislike of each others 'style' in fighting crime would be a must as well for me.