Originally Posted by
rpmaluki
After Injustice, a content future Superman, whose life is good, still surrounded by those he loves is a welcome relief for this fan.
What I was trying to say in my previous post is that Superman, as a work of fiction is unfortunately bound within the limitations of literature where no growth akin to real life applies. On occasion they've tried but will have no luxury of growing truly old with wrinkles, arthritic bones, bent back etc like us mere humans. It's fine to explore that in a once off but by and large, he will always remain as we know him today, which is almost the same as when he was first introduced. If in 80 years he's not "grown" It's hard to imagine his supporting cast shifting away as well.
I'm not a fan of a multi billion year old Superman but this is almost meta, like DC is saying even if time will pass in the real world Superman and Lois will continue to live on long after we're dead. Like the Simpsons, they will never grow old and they've included that in the narrative with the eternity formula. It may be cheesy and certainly not for everyone but that's my understanding of the character and his story culminating 80 years and counting. It's not to say they will never explore the world beyond Lois and Jon, but they are cementing those two in his life as he continues doing what he's always done being Superman.