After a 15 minute google research, i can confirm this is a new Metal Gear Solid game, or AT LEAST, a new project by Kojima, being shown to the public in a very bizarre, mysterious, unique, and HEAVILY amusing way, like only Kojima himself could've thought of D8
To prove it, here's some stuff:
First, this is from the "About Us" from the Moby Dick page
Moby Dick Studio is a game developing company operating out of Stockholm, Sweden. Moby Dick Studio was founded by CEO Joakim Mogren who after years of working for a major American developer brought together people out of various game studios from around the Scandinavian area to start something new.
And as i quote from another site, ""Joakim" is a rearranged spelling of "Kojima". "Mogren" can derivate from "ogre", as in "Project Ogre", a game Kojima announced that is supposed to be different from other MGS games, and it'll have an Open World design.
Then, there's some clues left in the video, this one being the most important and revealing one, in my opinion:
And if that doesn't convince you, if all this information is merely subjective for you, and you REALLY need an obvious, solid and convincing proof that Joakim Mogren is not Kojima in disguise, well, here is the official account for Joakim N. Mogren:
https://twitter.com/JNMogren
(Still wondering what that N means)
SERIOUSLY, if that face doesn't convince you, NOTHING WILL

He's totally pulling off a Liquid Snake there. And he's doing it very good too.
And he just had to add the "NOT Kojima" for the lulz, and to prove how much fun he's having out of all of this.
And if you want EVEN MORE proof, then well, the trailers (yes, there's two...just a slightly different version of the first though) are FULL of clues and messages, that many people have begun to discover, such like the face of the doctor being too similar to a certain face in Metal Gear 2 (not Solid, just MG), or the white petals flying around the main character, who has a VERY familiar mullet and face. You can browse around the comments in this site and enjoy:
http://kotaku.com/5966792/this-is-all-w ... antom-pain
Now, back at the trailer...it's creepy, mysterious, BIZARRE AS FUCK, and i LOVE it already. I don't know what the hell is going on, but i can't wait to see more about it, and all of my interest now belongs to this project.
Can't wait to see an interview with Joakim, too. I laughed my ass off when i saw his picture, and i just would LOVE to hear him talk with a swedish accent XDD And i don't even know how a swedish accent is like!!
Fucking Kojima, you're a fucking genious, you fucking know it and you fucking love to have fun with that D8