user, I think there's a much more easier answer to Hollywood's sudden fascination with Anime.
You need to ask yourself first, does anime threaten Hollywood? No, although we surround ourselves with weeb shit outside of the internet, actual physical advertising or mentions about eastern animation barley happens. There's little to no western animation equivalent, excluding Disney for obvious reasons, because most of it is CGI and considered its own beast or too small to even count. Anime it popular now, but its mostly a bubble (Third one to be exact) with normalfags, they have a difficult time differentiating from quality. Yeah they might watch FMA or Death Note, but those same people would have watched Elfien Lied or some trashy moe show and consider it of equal quality. Hell you got normalfags gushing over JoJo and My Hero Academia, while showing the same love for Steven Universe and OK-GO. Then you have cons and other gatherings but they've been around to the point where they're no longer special, hell cons about My Little Pony still happen with hundreds of people going and the news stopped reporting on it because it got boring, and they've been around for only 4 years.
So what reason does Hollywood want with Anime, though I've already said the current obsession is a bubble, the general public has always been interested in Easter crap because they consider it exotic. The general public (USA) considers anything out of its borders exotic, that's why you still have movies focusing on Greek/ Egyptian Mythology; when was the last time you saw a action movie or comedy focus on Christian mythos beyond shit already highlighted in films like Indian Jones, the Seth Rogan movie 'This is the End'? Even if they do make one, its in a form of a shitty horror movie or remake of another film. Then you have Marvel here that managed to perfect the Super Hero film factory, currently making billions on adapted properties for the House of Mouse.
Now you have almost every studio trying to make a franchise on some old dusty property, from Transformers, Jem and the Holograms, TMNT, Masters of the Universe,GI Joe, King Arthur, Universal Monsters, Jamaniji, etc… Studios trying to make movies out of random shit thanks to the Lego Movie; Playdough movie, Slinky movie, The Emoji movie, etc… And Normalfags with no sense of taste eating shit up like if it were candy.
Adding everything together, Hollywood finds this fairly known eastern franchise that started out on something like a comicbook, had a bunch of eastern cartoons made for it; it has more volumes than the Bible; everybody is hungry for 80s/90s/ nostalgia or all the hips kids are watching these bizarrely drawn cartoons online 'for free' and buying merchandise like crack; you got cash strapped Japanese studios that are barely able to give their animators a decent wage (along with Japanese suicidal work society) and finally you have Studios like Sony and Netflix desperately needing a franchise to make a decent profit. It took comicbooks decades to make a decent translation to the big screen and currently the only successful anime/ manga adaption Hollywood has made in the last decade is with Tom Cruise and that should worry everyone
Worst part about this, said Japanese Studios are becoming more comfortable with the idea. The Japanese movie industry is equally as lucrative as Hollywood, they see something successful in the west, the industry tries to copy it to some degree. With the increased enthusiasm to create new live action movies based on anime/manga; seeing JoJo, Naurto, Bleach, and FMA getting an adaption; as long as they fail (JoJo bombed both critically and financially) and Hollywood (Or just Disney) continues to rake in billions while getting decent to good reviews, they'll float the idea of selling some film rights to the west.
