[Zanku]

Well, we might see Raiden again...but Kojima only put Raiden in so that we could see Snake in a different perspective, and that after playing as a Beginner, Snake would look so much more impressive! To be honest i would rather not play as Raiden again, i'd prefer to be playing as Snake...
Raiden was just an odd bean in the series, all the past FOX-HOUND members were given codenames consisting of something personal, and an animal they identify with, here they are -

Solid Snake
Liquid Snake
Solidus Snake
Revolver Ocelot
Vulcan Raven
Sniper Wolf
Psycho Mantis
Decoy Octopus
Gray Fox

And then we have Raiden... w00t, sure pushed out the boat thinking up that They should of called him something cool...like Gray Fox or Decoy Octopus.......those are damn cool codenames...wtf is Raiden all about?. I like the way that he has girls eyes, on the making-of dvd the guy who made the computer generated Raiden said he gave him girls eyes, heh!

Enough about Raiden, i tell you who i want to see - Master Miller!! I hope we see him training up Snake in survival, that'd be really cool, even if he isnt in much of the game, a small appearance would be cool, i liked Master Miller

Spoiler: show

(damn Liquid killing him!)