More than anything I hope that the online mode (MGO3) will be equal to or better than the online mode that was a part of MGS4, I put so much time into that damn game and the servers for it are going to close forever in a couple of months so I'll never be able to play it again.
Admittedly the teaser is exactly that... a teaser. Doesn't really show much at all, the top-rated comment on the video puts it well:
Originally posted by another user
Dammit, people. This isn't a TRAILER. This is a TEASER. It's not supposed to give information on the game or anything, it's supposed to either hint at something bigger (like a real announcement) or give a LITTLE sneak peak of the game if it's still in early beta (guess it's the former case for that one). Stop flipping your shit, the point of this teaser is to say "hey, see that guy being operated and stuff ? reminds you of raiden, uh ? METAL GEAR RISING INFO ON APRIL 30th, BITCHES".
Fortunately some actual news is going to be put out on the 30th.