Yes, DC Casting An Older Hal Jordan Does Make Sense For The New Green Lantern Project

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Although unexpected, the decision to cast an older DCU Hal Jordan is an inspired choice not only for Lanterns but also for James Gunn's DC Universe as a whole. James Gunn's upcoming Superman movie is introducing the DCU's first on-screen Green Lantern, Nathan Fillion's Guy Gardner. Shortly after Superman, the DCU's "Gods and Monsters" chapter will follow two other Green Lanterns in their own show, the upcoming Lanterns thriller series. In it, Hal Jordan and John Stewart will team up to investigate a mystery on Earth. Lanterns' full synopsis is yet to be revealed, but Hal Jordan's casting might be revealed soon.
The search for the DCU's Hal Jordan has reportedly begun in early September 2024. Josh Brolin seems to be the top contender for Hal Jordan, with Matthew McConaughey and Ewan McGregor reportedly in the running as well. These are unexpected candidates, as all three actors are over 50 years old, while the DCU's Superman is in his early 30s and The Brave and the Bold's Batman is expected to be in the 30-40 age range. All main members of the Justice League, including the Green Lanterns Hal Jordan and John Stewart, tend to be the same age in the comics.
An Older Hal Jordan Makes It Possible For The DCU To Explore More Green Lantern Stories The DCU Could Dive Deeper Into Green Lantern Lore With A More Experienced Hal Jordan

Although casting an older Hal Jordan could mean that the character will retire soon after his introduction, this choice could actually help Hal Jordan's DCU story. The poorly-received Green Lantern movie starring Ryan Reynolds centered around Hal Jordan's origin, making its DCU equivalent rather redundant. Instead of a new origin story, the DCU could explore Hal Jordan's many other comic book adventures, from his early encounters with Sinestro to his missions alongside other human Green Lanterns to Hal Jordan's most iconic storylines. Hal Jordan has more than 65 years' worth of comic book stories, so there's no need to repeat his origin story in live-action.
Already established Green Lanterns provide the perfect chance for the DCU to explore a lived-in universe with plenty of cosmic stories to tell
Besides, an older Hal Jordan also entails a more expansive Sector 2814. If Hal is already in his 50s and Guy Gardner is already teaming up with other metahumans by the time Superman becomes a famous superhero, then human Green Lanterns such as Kyle Rayner, Jessica Cruz, Simon Baz, and Sojourner Mullein probably exist and work for the Green Lantern Corps. Already established Green Lanterns provide the perfect chance for the DCU to explore a lived-in universe with plenty of cosmic stories to tell across several movie and TV titles, whereas starting from scratch could limit the DCU's Green Lantern Corps.
The DCU's Young Superman Doesn't Require Other Characters To Be As Young Superman's DCU Journey Doesn't Have To Start At The Same Point As Other DC Characters

Custom Image by Kevin Erdmann David Corenswet's Superman will begin his DCU journey as a young hero in a world where many superheroes already exist. Superman's young age suggests that other DC heroes such as Batman, Wonder Woman, the Flash, Aquaman, and the Green Lanterns are also at a similar point in their superhero careers. After all, Superman is supposed to be the role model for all DC heroes, and he usually pioneers the age of superheroes in the DC universe. However, the DCU won't kick off the same way the DCEU and the MCU started their respective overarching stories.

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