No really solid hook. The imagery - as great as it looked - is also not particularly new. The whitewashing controversy. The fact it's a movie banking on star power when STAR POWER as a fuel is highly diluted and has been for like 20 years.
That it's an anime adaptation isn't really that big a deal, I don't think. I keep seeing people bring it up, and I don't know why. Audiences don't really give a shit what the movie they're going to watch is adapted from. Laaaaaarge percentages of them will never look at that source material no matter what it is. Book. Cartoon. TV commercial. Board game, whatever.
Is the premise interesting, can you sell that premise intriguingly. That's really all that matters at this point. You can adapt a fucking coffee cup if you can knock out a commercial that makes people feel like it'll be a good 90 minutes at the theater.