These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Superman/Batman: Public Enemies
Ho Yay: You can read a good deal of this into some scenes between Batman and Superman.
Nightmare Fuel: Metallo's horribly-burned body. Also the sight of a very 'roided-up Luthor could also be unsettling.