Metal Gear Phantom Pain?

So, recently there's been this new trailer for a game that's called "Phantom Pain," it shows two guys trying to escape from this hospital where gunmen are entering in it and killing all the patients around them. If you guys watched this trailer, you'd probably think that it's not Metal Gear because it's so different than most of the other games that they've released:

There's only one thing that's kinda bugging me about this whole thing and that is clearly...

 The main character:

 The main guy of Phantom Pain, where at times we can actually see him, has a bandage around his face and a hook for a hand. He can hardly use his legs in this trailer because of the injuries he sustained from wherever. But if you look closely at the end of the trailer for Phantom Pain and take a look at Big Boss for Ground Zeroes, you can see a huge resemblance:

 Big Boss from Ground Zeros, looking quite older than what he has looked like in previous MGS games.

What the mysterious, injured man looks like in this trailer

Here's one more, of a much better shot for you:

 They look nearly identical don't they? But earlier in the Phantom Pain trailer, we see the main character having a hook for a hand. Does Big Boss have one?

No, he doesn't. This is what Big Boss looked like in Metal Gear Solid 4, having both hands intact. So what does this actually mean? It could mean that we're either in some dream of his, or he's hallucinated or something, but no, Big Boss doesn't have a hook for a hand.

Where would this have taken place? We already know how Big Boss got his eye taken out, thank you Ocelot, guy if this guy has his eye bandaged, then where does this take place? Did he re-injure it somehow? People were also mentioning that this could have been taken place during the Les Enfants Terribles, but then what's all of these killings going on? Who's the man that's helping the main character out?

Well, that's the only thing that is bothering me with this trailer, of course I'm not the only one bothered by it... There are other similarities that this trailer shows, such as the similar engine these games both used, the fact that there's a hidden word behind the "Phantom Pain" word when it shows, Moby Dick Studios is a company NO ONE has ever heard of...

Also, the texts that are popping up throughout the Phantom Pain trailer... take a deeper look at it...

>'-'<