I have two major issues with the look if this is indeed indicative of the majority of the film.
1. The film releases in less than 7 months. It is utterly ridiculous that our first glimpse is from a crappy children's Halloween costume. We should have a teaser trailer and some promo images by this point.
2. In the post-Marvel mega-success era, I don't entirely understand the need to reinvent the source material. Keeping it close to the source material is what set Marvel Studios' films that much higher than X-Men and Raimi's Spider-Man (both of which were considered highly successful and quality films for their time in bringing comics to film).
The addition of clothes and that tattoo seems to break away from a pretty reasonable foundation....keep it simple, stupid.
I see people arguing "why wouldn't they wear clothes?" Okay, we could go with that logic, but apparently Raph is wearing a Conan-like get up, Leonardo is half samurai armored, and Donatello is a mix of samurai armor with gadgetry. So, how does human pop culture result in this?
I mean, hell, there's a lot of art out there with more clothes on them with a more ninja influence, but we're going with samurai armor?
I don't see the clothing as necessary and the fact that it's on the halloween costumes makes me bet it will be the majority of their screen time. I'd dig it if it were in certain scenes (particularly Mikey wearing some clothes like this), but Leo sounds too much from the descriptions, Donatello moreso for his personality. If the description we have is accurate, I could see Raph working well, though.
I had low expectations to begin with. As we get closer to release without a glimpse of any promotional material, those expectations just sink further.
I'm going to REALLY have to see the CG faces, but not impressed with this. I didn't like Lizard looking like a rough skinned human's face rather than a lizard either. But I'll reserve concerns for that until I see CG in action. Even a screenshot can look kinda crappy compared to CG in action.