Plus the fact that he's not a big name means he can't do anything he wants. He can't go crazy like a Michael Bay would. He doesn't have the power to say "my way or the highway" like a Cristopher Nolan or Peter Jackson. If Jackson or Del Torro were directing and they wanted to significantly altar Prince Adam or Grayskull or whatever, they probably could. But this Chu guy - I don't think he has that clout yet. And that has been (up until Avengers) Marvel's plan - hire competent, but not superstar directors so that Marvel can really get the movie made they want.
I'm not down on this announcement at all, and I'm a big movie buff. I'm more worried that Mattel is behind this than I'm worried about Chu.