Where? When? Tell me because I missed the **** out of that follow up. Nothing in the Knightmare had anything to do with the rest of the movie
WHAT metahuman subplot? One line and two visuals is not a subplot. A subPLOT is still a PLOT that has to be resolved in the story.
Knightmare is directly related to Batman's concerns over Superman's power. It is tied to the sequence where the new metahuman presence basically warns Batman of an upcoming event.
It's a subplot.
First, Superman's existence is part of the "emerging metahumans" subplot. It's the first thing Bruce becomes aware of. So all the controversy/commentary has to do with that concept inherently, as does all of Bruce's commentary regarding Superman's existence and potential threat.
Second, Luthor references a metahuman thesis. Over multiple scenes, the metahuman thesis is revealed to involve research and data on metahumans, which is why Diana is involved in infilitrating his building.
There's an entire "dream sequence" involving Bruce's discovery of metahuman elements, namely, The Flash and a warning of future events.
There's an entire sequence before the final fight where Bruce and Diana find out what Luthor has, which is that other metahumans exist.
There's then, in the denoument, a resolution to that element, where, at the end of the film, Bruce, who had been distrustful of emerging metahumans, asks Diana to help find them.
That is a subplot. It is not a large one, but it is absolutely there.
None. I only care about what's happening now, I don't need 10 mins of precious screen time wasted on unimportant story elements that have no baring on what I'm watching. If I wanted a comic book I'll read a bloody comic book.
It IS what's happening now. Part of the story of DAWN OF JUSTICE is the world's discovery of these metahumans, albeit on a smaller scale, with Luthor, Diana and Bruce.