Batman v Superman production designer Patrick Tatopoulos has shared concept art of a bat thing (not Man-Bat, I don’t think) that was originally literally going to be part of Bruce Wayne’s nightmares. It will be part of mine, now. If you click this, don’t say I didn’t warn you.
Source: Gizmodo – Artist Reveals Giant Bat-Creature That Was Going to Be in Batman v Superman and OH MY GOD SOMEONE SAVE US