Final Crisis Issue 6

Batman is seemingly killed by Darkseid.

Individuals

 * Batman
 * Superman
 * Darkseid

Behind the scenes

 * One should not worry about Batman. He's 70 years old, and will go on for at least another 70. Many Superheros are seemingly "killed", only to be revealed to have hoaxed their death, or awaken from a coma, or a myriad of other possibilities.
 * Superman was "killed" in the early 1990s, as part of a marketing ploy, only to return weeks later.