I wouldn't say that its completyl true . Triuth to be told Japa can make really cruddy adaptions too .( Attackk on titan coms to mind). I think The Ring was a good American vrsion Ringu ,and even Dark Water . I have seen fan stuff . If you have good peope who love the manga it would work.
I did say "virtually" always, which means almost
always, there's only very few exceptions of good Hollywood remakes & adaptations from japanese sources, but most of the time they are misses.
And I never said Japan hasn't made any lousy remakes of Japanese mangas/animes either, they have, there are some Japanese remakes & adaptations of mangas & animes that I think are quite bad or inferior quality to the original source materials. One of the main reasons could be because Japan's movie industry as a whole is smaller than Hollywood and they tend to have much smaller budgets than Hollywood. But Japan has also made some good adaptations too even with all the limitations that they have.
I just think Hollywood is more guilty of making lousy adaptations from Japanese sources, most of the time they're just not good, there's only the occasional good ones.
As for Marvel, although yes it is monopolizing the movie industry with its many successful superhero movies, but DC Comics is more successful than Marvel on TV. DC has many successful TV shows and cartoons on TV, like The Flash, Supergirl, Lucifer, Legends of Tomorrow, Arrow
etc and its many Batman
cartoons. While Marvel only has Agents of SHIELD
on TV, but like I said they are much more successful in the movie industry than DC, I don't think Marvel really cares much about the TV industry anyway, they seem to be satisfied enough with their enormous success in the movie industry and are more focused in that area, the TV industry is smaller so it's probably not a priority for Marvel right now.
Besides the Batman
movies and the recent Suicide Squad
movie, DC really doesn't have any other franchises that are big hits on the big screen...Superman
movies don't do well anymore in the box office. Although let's wait and see how well the upcoming Wonder Woman
movie will fair, I'm hoping it would do well at the box office because I'm a fan of Chris Pine
unlike Marvel, I think DC needs the profits from its many successful TV shows and cartoons, otherwise they would probably only have Batman to rely on as their main source of profit and success.