Because the Riddler is committing atrocities in "the war of jokes and riddles", one of the worst comics ever made, IMHO.
Seriously. This was a comic set in the past, playing the Nu52 Joker and Riddler against each other, recruiting all of Bats' rogues into it, and they were both so capable nobody could stop them.
Anyway, Batman got to the point where he was like "No kill policy, okay, but there are limits".>>101170888
Kang does not fight for a different power structure. He fights because he loves to wage war and to conquer.
Cap does not fight to preserve a power structure. He fights to save human lives.
Have you never read a comic before?>>101171108
I am sorry, let me rephrase that.
Are you actually an idiot or just being deliberately obtuse?>>101171216
A mentally unstable girl about to kill herself feels shallow and stereotypical?
Superman taking a minute of his schedule to save her life feels hackneyed?
You are soulless.