It bugged me considering it's an inversion of history that's only there to basically say "yeah, Supes ripped off Batman!"
Stupid and unnecessary, especially considering Batman as a character only exists because Superman sold so well they needed more superheroes and he was he best of the imitators.
It's also the only part of the movie he's in, and it's meaningless, so it just comes across as the studio or creators saying "But Batman is cooler/first." Why? Why is this important? They never do that in Batman origins.
You don't get "You mean like the guy in Metropolis?"
They let it stand on its own, but God forbid Superman projects fail to kiss the Bat ring.