Aside from a handful of early Season 1 episodes, I never really followed "Supergirl". But I must admit that I really enjoyed Cryer's version of the character in the "Crisis of Infinite Earths" crossover event.
I doubt there will be a full-on crossover, but some Arrowverse characters from other shows (including Supergirl's Nia Nal) have been announced as appearing in The Flash's final season. I wouldn't be surprised if there are more to come.
I know but they are just the minions. We need at least one for the Flash to team up with the big boss
Spoiler: Lex in Titans Season 4 I was really disappointed they killed Titus Welliver's Lex in his first episode of Titans, what we got in that good and I was hoping we'd see more of him.
I have a favorite superman! It's Tom Welling, his Kal-el grew in the role for ten years and battled some great foes! And Clark had some terrific character development! And I am not only saying it because I was nine years old when Smallville aired its pilot. But he had a better ten years than Chris Reeve and Henry Cavill! He never played second fiddle to Oliver Queen or any of the DC characters who appeared throughout its run, and most importantly, the quality never dipped.
There have been stories where's he's very long lived. DC 1 Million was one. And there was a multi issue arc in the Silver Age where he out lived Earth.
Right. Smallville also implied he might be nigh-immortal (at least till he de-powered himself, per the Arrowverse's "Crisis on Infinite Earths").
Superman and Wonder Woman got trapped in a pocket dimension for 40 thousand years and boned the whole time. After he got out, after he remembered that he was married to Lois, he apologized for cheating and acted like it never happened. In John Byrnes Generations, an elseworlds story, Batman and Superman started in the 1940s, and each of the issues in the 4 issue limited series covered one decade. At one point, Clark has to start wearing old man makeup so Lois does not look like she's cheeky old bat robbing the cradle. All of the DC Annuals one year were about what happened to the heroes after the world ended. Thousand year old Clark is explaining to his great great grand son, that every new generation of Kryptonian Human hybrid offspring is a little weaker than the last, and it really shows by how less graphically they explode out of their human mothers when being born. Why, he says, I can imagine a day when my distant progeny might just crawl out of a vagina without killing their mother. In Alan Moore's "What ever Happened to the man of Tomorrow?" which is the absolute conclusion to the DC comics stories that started in the 1930s, Superman fakes his death, and Clark uses Gold Kryptonite to strip his own powers, and he lives happily ever after with Lois growing old together. There's a time travel flub in this issue where Supergirl from the Past before she dies in Crisis, shows up, bumps into her boyfriend Braniac 5, and he starts crying.
Well, like others said, the Pre-Crisis Superman was virtually immortal. Then there is this excellent Elseworld story by John Byrne