Quote Originally Posted by dornwolf View Post
From my knowledge JMS was trying to have Batman and Superman coexist but caught shit for it and had to remove a couple of references. I don't think they were too happy about the the easter egg at the end of volume 1 and I think in the second he wanted to make a bat signal joke and was told to change it.
In the second Batman book there is a reference to Superman in a newspaper on the ground but as far as I know, that's it in terms of connections.