Chris Pine was a fantastic Steve Trevor and while Wonder Woman ended with his death, fans were quick to start speculating about the actor returning in the present day as a descendant of the original (something there's precedent for in the comic books).
With Wonder Woman 1984 set in, well, 1984, most of us assumed that wouldn't happen but when a still was released showing Pine back as the original Steve and decked out in clothing from the 80s, it's fair to say that we were all pretty confused. An explanation for the character's resurrection still hasn't been revealed, but Pine has known from the start that he would return.
"Patty [Jenkins] had told me this idea somewhere in the middle of the first one," he revealed after saying he wasn't at all surprised by the news. "And when Patty gets an idea, it's a pretty powerful thing, because you can see the kernel land in the dirt and then all of a sudden it just starts growing and it becomes a tree... She can make you do anything."
Wonder Woman 1984 was scheduled to come out next November before being pushed back to June 2020 so it's probably going to be a while before we see anything else from this one (Comic-Con in July seems like the safest bet for a trailer debut right now).