It is infact a Metal Gear game, what it isn't would be metal gear _SOLID_.
Kojima himself said this is not intended to be a Metal Gear Solid game.
“Metal Gear” nowadays simply refers to the universe, and Solid is kind of
genre specific, therefore, if this were not a Metal Gear game, it would not
feature Metal Gear characters or concepts.
Now stop fixating on this one insignificant point, and look forward to the
game for what it is; taking the Metal Gear franchise into a new direction.
Also, before you complain about how it's unrealistic and over the top for
the franchise for Raiden to be hurling RAY-like Metal Gears around, go play MGS4
again. Notive that Raiden hurls 3 Gekko around all at once, then, in act 4,
holds back a certain sea-fortress that is around the size of 10 aircraft
carriers, and probably has even more horsepower, while he has only 1 arm.
With that out of the way, this game looks amazing, the graphics are gorgeous,
the cutting mechanics are jaw dropping. I just hope that the story and gameplay
live up to the hype.