Jimmy must know Clark is Superman
Jimmy must know Clark is Superman
Aside from clearly being a smart investigative reporter, or intern at least, and no one questioning Clark's absence in the T-Craft. Clark says their first date was 3 months ago while cooking dinner breakfast (conveniently the only period skipped in the intro timeline), and presumably Lois is dating Clark, not having ice cream and seeing movies with Superman. AND then Jimmy straight-faced says at the end Lois and Superman have been hooking up for 3 months. Jimmy knew the entire time.
Perhaps, but I think that misses the point of Gunn harkening back to Silver Age comics with this movie. Puzzling out the "logic" of who knows what and why is sort of antithetical to the exercise being conducted. It's like the folks who get wrapped around the axle about the conclusion of Superman 1978 not making a lick of sense to someone with an elementary understanding of physics. Oh, Superman can turn back time by flying around the Earth backwards? That's absurd!! Yes, it is, now shut up and pass me the popcorn.
If it is necessary for the story, Superman's identity will become relevant. Otherwise, everything operates on a shrug and a hand wave, and I'm sort of fine with that. Secret identity management is a fun aspect of a character like Spiderman, for example, because his whole thing is the burden of being a gifted individual. Great power = great responsibility and all. Therefore, making Peter Parker suffer because of Spiderman is kind of baked into the text of the character.
Meanwhile, I think Gunn's approach to Superman/Clark is that neither is burdened by the other. I'm not even really sure he views it as a duality in that way. The text of the film seems to indicate that, in Gunn's view, Clark and Superman are indistinguishable from one another, or even that Clark (the human) takes primacy over Kal-El/Superman. This intentionally contrasts with the Snyderverse interpretation of DC heroes, which was much more interested in how INhuman the DC canon of heroes were, Superman most of all.
Well, it is kind of relevant if people at the Bugle know, but play along and keep his secret anyway. It means they're not idiots, and actually want to protect him. And there's no way Jimmy not batting an eye at the end wasn't intentionally telling.
And concerning his identity, I think one of the themes was moving the emphasis from Super to Man. He's an imperfect and real person with emotions, he genuinely loves pop punk, and when he blows everyone out of a black hole, it makes his mouth all numb. Plus, he's got a dog, come on. I like the idea that Clark is less his secret identity, and Superman is more his public identity. But he was raised as Clark.