It's like a recreation of the Plant chapter (MGS2). Even the Cyphers are back. Gets me all excited just seeing that.
I like the Souls style invasion multiplayer feature - having to rush back to your own customised version of Mother Base and protect it from other players who seem to appear whenever you have your network features on, seems like a really cool idea to me.
Looking forward to seeing them reveal Metal Gear Online 3 too. Hopefully it's better than MGO2...they haven't gone a step wrong with everything they've revealed so far with regards to MGSV and I never felt that with the past few Metal Gear games, so I am hopeful that it turns out be as good as Ground Zeroes and all of these reveals are pointing it to.
I just want that magic to return (MGS1-MGS3 is probably my favourite trilogy of games, ever)