Seriously, genuine question: Why is it that whenever Hollywood adapts comic books into movies they're always box office hits, yet whenever they remake video games or anime it's always a failure? The last great hollywood movie about a game was Mortal Kombat, and that was in the 90's. Plus I think Michael Bay would do quite a good movie version of Attack on Titan...
Well, it actually took a lot of experimentation and writers who legitimately care about the property to get to what we can consider to be golden age in comic-book movie films. When you think about it, prior to the year 2000, there were maybe three films that could be considered great, Superman 1-2 and Batman. Other than that, it wasn't that popular of a genre and the movies were often average at best.
The three other Batman movies from the 90s were poor to mediocre, Superman 3-4 were below average. Besides that, what was there, a bad Fantastic Four film, a bad Captain America film, a bad Judge Dredd movie. Heck even after the 2000s started with good movies like X-Men and the first Spider-Man, Hollywood still hadn't figured it all out. Comic-book/Super hero movies didn't start becoming great on a regular basis until Nolan took over Batman and the Marvel resurgence occurred.
So with that, look at how long comic book characters have been around. The Avengers, arguably one of the best super hero movies around, was based on a comic that came out in the 60s, it didn't get made into a movie until 2012. Batman first appeared in comics in the 30s and didn't get a good movie until the late 80s and didn't get a great movie until 2008.
My point is, it takes time to develop a genre and make it into a marketable power house. It takes the people who grew up with that source material and understand the culture to get to the point where they can take the reigns away from the standard producers who just want to use the name of a franchise and hire whatever director to throw a movie into theaters.
That's what happened with super hero/comic book movies, but it took a long time. I see the same thing happening with video games/anime. Video games picked up in the 80s and anime just started getting introduced to Americans during that decade, too. Both mediums have plenty of good stuff to choose from, but like I said, it will take a while before the properties actually get somewhere. I do think a big measuring stick will be the upcoming Warcraft movie, which will tell whether video games have hit that mark yet or not.
Now, as to Naruto being made into a live action, I think there's going to be a lot of liberties taken to make it work. Hiring young teen actors to play basically soldiers prepared to kill and fight with giant toads and slugs. It's going to be a hard sell whichever way you slice it. In the end, it doesn't really matter what they do, though, since we all know the downward spiral the series already went. If the movie sticks to the source material, it's going to be terrible.