Oh, I can
totally see it - and being as this is before Hal gets a ring, you don't have to break the SFX bank. I see it a cross between "Top Gun" and "X-Files." We'd see Hal going through all his issues as a young rebellious fighter pilot, etc. still fearless, but much more reckless - here we'd see the cockiness that becomes tempered with age. Mix in the stuff with his father and a restlessness about pushing boundaries, then open up his world by throwing in random Area 51 type alien shenanigans, (roll it out over several seasons the way "Smallville" and "Gotham" took a bit of time before going full-on comic booky) maybe with the GL movie version of Waller where the government is involved, etc. where we'd see Hal hone the "honesty" part of his character with all the alien government cover-up stuff. And of course you'd have Carol and her dad, Hector and Tom etc... I imagine possibly in the third season there'd be a cameo by Abin Sur....
And that's just off the top of my head, but yeah, now I wish it had happened....