But most recent film and TV adaptations of the characters have seen the classic "triangle for two" as something to be avoided. Man of Steel had Lois figure it out shortly after their first meeting.
Probably the only time other than
Smallville that Lois has learned Clark's secret
before he became Superman. And it was cool the way she tracked him down by being a good journalist, as opposed to the usual thing of the world's greatest investigative reporter being blind to the secret right under her nose. There's a lot I hate about
Man of Steel, but that's one of the parts I love.
Incidentally, that's another change in Lois's portrayal that the Donner movies codified, if not originated. In the early years, Clark was the celebrated newsman and Lois was the "girl reporter" pounding on the glass ceiling and trying to prove she deserved to cover the same serious news pieces as the men, but usually getting sabotaged by Clark unfairly scooping her on Superman stories. By the Bronze Age, she was being portrayed as a celebrated reporter in her own right, but still less so than Clark. I think the '78 movie was the first notable version of the origin story where Lois was already a Pulitzer-winning, world-renowned investigative journalist from the start, with Clark being the one struggling to catch up with her (and still cheating to gain an advantage). That, too, was carried forward by Byrne,
Lois & Clark, etc. and became part of her standard portrayal.
And Superman & Lois made the smart and charming decision to have Lois fall hard for Clark, not Superman, to the extent she doesn't even care that Superman might be interested in her -- though Clark reveals the truth to her anyway as soon as their relationship starts to get serious.
Shifting Lois's love interest from Superman to Clark began with the '86 John Byrne reboot and has mostly been carried forward since then. Although having Lois not be interested in Superman
at all is kind of a novel twist.
Not only is the "triangle for two" rather dated and potentially problematic as you note, I think narratively it's always better when Lois knows, so she and Clark can function as full and equal partners.
I think it's always better when characters are in the loop. If they're out of the loop, there's really only one story you can tell about the relationship -- how the hero hides their secret. We've seen over and over that characters get far more interesting storylines when they're brought in on the secret. I still think the best thing that ever happened to the character of Aunt May was J. Michael Straczynski having her discover that Peter Parker was Spider-Man and become his ardent supporter and confidante, rather than just the clueless old lady he kept in the dark.
It is funny that Gunn said this whole new Superman is set in his early days as Superman when MoS was the very start, the future movies being his early days. Not really reinventing the character there.
Except we never really got the chance to see much of the early days of that version of Superman. MoS was all about how he
became Superman; he didn't get the job at the
Planet and settle in Metropolis until the very end. Then BvS reduced him to more of a MacGuffin than a character, a catalyst and symbol that other characters reacted to, and he didn't really do or say much of anything until he died. (I think he had fewer than 65 lines in the entire theatrical cut.) Then the theatrical
Justice League basically rewrote the continuity to ignore the whole "early days" thing, ditching BvS's portrayal of Superman as a controversial figure and retconning him into someone so long-established and universally beloved that his death threw the world into a deeper despair than humanity had ever experienced. And of course, he had a limited presence in that movie, being dead for the majority of it, so again, we never really got much chance to explore his life.
So a movie that actually
explores Superman/Clark's life and relationships a few years into his career, instead of jumping right from his beginnings to his death, would indeed be something the previous movies didn't do.