There seems to be some progress in the western animation scene. Dungeon Crawler Carl and Cradle are both getting animated adaptations.

The biggest tragedy is that even incredibly popular authors like Brandon Sanderson don't get a chance of having their own animated series. Mistborn would work perfectly as an anime adaptation.

Marvel and DC historically created way too much consolidation which really limited creative output. And by this point people seem pretty fed up with 'capeshit'. Western comics are also incredibly hostile towards new readers, especially when compared to managa where you can just pick up the story and binge read the whole thing without having to pick up a million other things.