Exmongum on 30 December 2013
Batman exists to rid Gotham of crime, so he would likely leave Jesus alone. Jesus would then preach love to the seedy part of society, with some miracles sprinkled in for good measure, leading to many criminals abandoning their ways (Jesus did have disciples with colourful pasts, including at least one terrorist, Simon the Zealot). This in turn would render Batman obsolete, causing him to retire from fighting crime after seeing Jesus rehabilitate criminals, therefore 'killing' Batman while sparing Bruce Wayne.
