DC Cinematic Universe?

I think the reveal teased at the end is Superman. Just makes the most contextual sense. Although I would love for a surprise GL appearance to happen.

You know what I realized watching that trailer again? Except for a few of the more CGI heavy scenes, it doesn't feature much of Zack Snyder's typical washed out color grading. In fact, that initial Wonder Woman scene has more natural tone lighting than anything Snyder has ever done. I think they're serious about the shift in tone, but aesthetically and in terms of content.