Kinda surprised no one’s said it yet, but Marvel’s Runaways. At least the first arc or the BKV run. And it takes place in LA so they wouldn’t need to go far to film it.
Challenges would be finding a good cast (kids can be tough) and, CGI velociraptor.
Phase IV for the ending, when the heroes have apparently been wiped out and the Elder Gods have inherited the universe and won everything and you’re thinking, “Man, that was a bit bleak”, and then it pulls back and it turns out that St. John has fucking gamed the cosmos and it’s completely perfect and best of all is he’s still a smug prick.
PS 238 is quite a bit different than Sky High or Zoom in that is it an elementary school.
Making this list is a little harder than it was five years ago, as so many characters have made the jump to the big screen. Keeping to the OP, I’m am going to limit myself to a) superheroes and b) superhero movies. For example, I really like both the Legion of Super-Heroes and Top Ten, but I don’t think either would work well as a movie. That said…
-Zatanna
-Sandman. Not the Lord of Dreams, but Wesley Dodds, as seen in Sandman Mystery Theater.
-Starman. Jack Knight, if you please.
-Hawkman. I know he’s been on DC Legends of Tomorrow, but I prefer the Thanagarian cop version to the reincarnated Egyptian one.
-Star-Spangled Kid/Stargirl. Use her original series by Geoff Johns from before when she joined the JSA.
-Black Lightning
-Nexus
-Madman
-Zot!
-Mage. Does Kevin Matchstick count as a superhero?
-The Defenders. Not the Marvel Netflix Defenders, but not quite the Defenders of old. I’d like to see Dr. Strange get together a team of mystical allies to function as a team.
Mister X. A guy who designed a city that made most of its residents psychotic, and tries to fix it using a drug that prevents him from ever sleeping. Plenty there to work with.
That seems obvious with the benefit of hindsight. A little awkward and perennially distracted bookworm who also happens to be a creepy gasmask-wearing judo master shrouded in green vapour. A sassy Dian Belmont dominating the movie otherwise would be fun to see too.