This is a 3D CGI animation about a superheroine who's hero name is Ladybug (I know, it doesn't have quite the same cool sound to it as Spider Man). Her normal name is Marinette. She is a highschool age girl who like most superheroes, has the problem of mixing normal life with hero life. Her sidekick (who almost seems more like a co-hero in this, from what I've seen in the trailer, as they appear to often work together as equals) is named Cat Noir. In his normal life, he is an ordinary highschool aged teen named Adrien. Their powers come from various fashion accessories, which have the powers of animal spirits. Ladybug's power source is her ear-ring. Cat Noir's power source is his ordinary finger-worn ring. There's a sort of romance between the two, that never seems to work. In their ordinary forms, Adrien doesn't find Marinette all that attractive, even though she finds him attractive. In their superhero forms, he finds her attractive, but she doesn't find him attractive. You see, Adrien doesn't realize that Ladybug is simply Marinette in a costume, and Marinette doesn't realize that Cat Noir is just Adrien in a costume. There's some cool trailers out now for it.
The most recent trailer for it is this one.
https://vimeo.com/130079689
There's also this one from early in the production, when it was planned to be a 2D Japanese anime instead of a 3D western-style CGI animation. This isn't an officially released trailer, because they decided to go with CGI before this trailer was released, so this is a leaked trailer. But it most certainly did come from the actual company (it was leaked from them), and is not a fan-made trailer, so in that sense it is official.
By chance I ran into the guy (Thomas Astruc) who's the originator of the idea for this TV show, while I looking for more trailers of this show. He has his own Youtube channel. I talked to him about the prospect of it being made into an anime. His reply was that if the CGI animation is a success out on the market, that he would then consider going through with making an anime version.
Link to his Youtube channel https://www.youtube.com/user/totobonheur
He currently is working at ZagToon (the the French company that's leading the whole process of making Miraculous Ladybug), and according to Linkedin, had previously worked at a number of other animation and entertainment companies.
There are multiple companies from around the world (including in the US, France, South Korea, and Japan) that are currently working on this show. One of the companies working on it is the famous anime company Toei Animation. Here's a video showing a kind of behind the scenes development of the show and interviews with a couple of the show's creators from the French company ZagToon.
Interesting that some of the storyboard images were done in an anime/manga style.
Here's a leaked in-production video I just found on Youtube, depicting part of a battle scene. You can tell it's not the final version intended for TV broadcast because it has a time-stamp indicator on the bottom of the frame.
I've read a couple places online that its first airing in the US will be in September 2015. However I have yet to find an official statement of this on the ZagToon website. I don't remember where I read this release info from now, but if it was like a press release, on an entertainment news website, then it probably was official anyway. What it does say for sure on their official website is that this show will be airing on a Disney owned channel (possibly The Disney Channel, or Disney XD), and that it will be available in 120 countries (the US isn't mentioned by name, but I have a strong feeling we will be getting it, or at least I sure hope we do). It also says something about 26x26'. Not sure what that means (maybe the physical film size of the film used to record the animation frames, I'm not really sure though).
Here's a link to the official ZagToon website.
http://zagtoon.com/
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