My experience with the DTVs has taught me that they don’t do a good job adapting long stories. They just don’t have the runtime or budget for it. So while once upon a time I would’ve asked for something like Superman & The Legion of Superheroes, now I think something like the Parasite three part arc from Williamson would be a better fit. It’s short and compressed, they could easily pad that out in a movie with more time featuring Superman on the run from the Parasites or flesh Parasite out.