I am excited. Here’s some info from Joystiq.
So what else is new about Ground Zeroes? It’s a “prologue” to Metal Gear Solid 5, says Hideo Kojima. The open world of Ground Zeroes is literally the entire world – a helicopter can be called to help during missions or ferry Snake in and out of mission levels. Moreover, you can customize the music that the helicopter plays when it arrives to help you (“Flight of the Valkyries” played during the demo we were shown today – Kojima says the louder the song is, the more of a chance of you getting caught, so maybe Slayer wouldn’t be the best choice).