"Who is this live action for?"
Everyone that dismisses comic books and cartoons no matter what. Everyone here is already a convert, we know how good cartoons can be. But outside of anomolies like Frozen, animation just is NOT as wide stream as anything live action. Like the new Spiderverse movie has made like 600 million! Fantastic, huge improvement over the first!
The most recent live action Spider man almost 2 billion. Nearly 3 times as much. Even the lowest grossing live action Spidey, Amazing 2, made 800 mill.
Look at the top 200 highest grossing movies of all time. 26 of those movies are animated and they're almost all sequels. The other 174 slots are live action. (And in the top 50 its like, 7 films, none in the top ten.)
WE all know animation is great, we don't have to be convinced. But the general public its always just kids stuff and they'll never give it a chance.
If you want to reach a NEW audience, you need to do live action. Same with Last Airbender.
Yeah, it's near perfect in its animated form and live action won't improve it. But there's millions and millions of people that might be willng to watch it and get the same story we already love, that have ignored the animated one for 15 years... just because its animated and "for kids".
Just how it is.
Also, One Piece is currently a 1088 chapter, 102 volume, 1070 episode anime with 14 movies that's been running for 26 years and has AT LEAST 4 years to go if not another 10. . You can't convince anyone to start that at this point. I used to introduce friends to the series and I don't anymore, it's too much a commitment.
But an 8 episode mini-series? That will get to what most people consider THE high point hooking moment in that time? I might be able to finally convince some of my friends to give it a shot just so they finally understand where I've been coming from all this time.
The live action isn't for the pople who already know the property. They're along for the ride ANYWAY. Its for the people who would never have touched it otherwise.
"But it's already a best seller and perfect in its medium".
So was Lord of the Rings. So was Super Mario. Sometimes it doesn't matter if its already the most popular influential thing, it can still reach a new audience. And, as someone who has read LotR 4 different times in my life, about once a decade, and grew up on the animated versions... I love the movies way way more, for a wide variety of reasons.