I wish the Valiant universe rights weren't all over the place, the reboot would make an amazing cinematic universe.
Always wanted to see a black mirror like anthology for Dial H for Hero, and after reading Astro City, it could definitely also be an amazing anthology series. (if it had the budget)
I asked live action specifically, since I genuinely believe any comic could be great animated. (if it had the time and budget lol)
A lot of the Judge Dredd story arcs would make for good TV, near futuristic sci-fi serialized stories under a post apocalyptic dystopian police state.
Fear agent or Remender's x-force would be awesome mini serieses.
Undiscovered country would be pretty interesting to see the reaction from a broader audience, and I think the invisibles would be great to see how they handle a live adaptation.