Comics exist in serial form, arriving in installments that Hollywood simply cannot mimic, even with movie franchises. Film experience is more compressed. There are fewer themes and they must form a rounder whole. It does not explore details with the same leisure as comics and has only one or two major climaxes total rather than present a new one each issue. The arc of the story in film is simpler.
Television is a much more natural medium for comics on the screen.
It is serial as well and 22 pages fits well into 22 or 40 minutes much better than into 120 minutes. There are a few examples of this problem in action. Anime and Manga fans know how much back-story was missing in Akira, a long and extremely well scripted feature. On a more personal note, I cringe at ports of old TV shows to film. Let 'Charlie's Angels' be good.