Comic book adaptations are huge. It's been a long running trend now (aside from 80s movie remakes - Footloose? A sequel to Top Gun? WTF Hollywood).
And you can bet comic companies are going to milk it for all it's worth. On that note, yes, they are actually going to make an Aquaman movie.
Some better comic adaptations:
Scott Pilgrim vs The World
the Watchmen
Sin City
There are more, but those three stick out. They changed the ending of the Watchmen, which at first i really didn't like. But in retrospect it was the perfect thing to do. A giant alien destroying a city would have been too hokey and has been done into the ground.
They also compressed what? Six or seven volumes of Scott Pilgrim into one movie and all said and done, did it quite well.
Sin City was the most direct adaptation I have ever seen. Scene for scene straight from the books. Nothing cut out, nothing added (except bits of colour here and there, but Miller had his hand in the production and loved the effect). We'll be waiting forever for the sequels.
V for Vendetta was disappointing, as was From Hell...and oh god, the League of Extraordinary Gentlemen. What a bomb. No wonder Alan Moore is so pissy when his books get made into movies.
RED was an entertaining adaptation, but not really true to the original. On that note, I would love to see a really well done adaptation of Planetary (probably one of my all time favourite series) but that will never happen, and if it did, I'd never be satisfied. Of course, they said Watchmen could never be made into a movie....