This is a very basic list. I think these characters will be DLC. I'm being realistic here. Your thoughts?
Big Boss (Snake)
Crash&Spyro- These will be the Activision versions.I also believe Spyro will definitely be paid DLC. There's a small chance Crash might be paid DLC as well. Things change.
Some characters that have a smaller chance of being added are
Abe (Abe's Odyssey)
Wander or Ico
Dart Feld (I personally don't like Legend of Dragoon but he is first party and has a cult following)
An Assassin from AC (I honestly don't think this is too likely but I'm probably wrong. I'd like it to be Aveline or Altair or Connor. I don't like Ezio.)
I'll be basing my predictions off of Paul Gale's hints as well as Rumba's hints for my own speculation
Big Boss (The most recent Metal Gear SOLID games were all about him Peace Walker and the upcoming Ground Zeroes)
Based off other stuff, I'd expect:
Abe from Abe's Odyssey - The creator contacted them regarding this I think, and he's in full support of it
Dart Field - The recent renewing of the IP is suspicious, they're obviously going to revisit the game
Connor - Ubisoft loves Playstation WAY TOO MUCH to avoid this free Asssassin's Creed 3 marketing
Lightning - This one I'm already going to know is going to be paid DLC
Selvaria Bles from Valkyria Chronicles - Because VC is too **bleep** awesome to ignore, and it's PS3 exclusive, erm... Sony exclusive, with the exception of Project X Zone. The again, it's owned by Sega
Someone representing Atlus - The Persona brand is mainly Playstation based (Except Arena, but that's a Spin-Off... Off a Spin-Off of the main SMT games). They also brought us the glory that is Demons Souls... At least to North America.
I think most people are going to have the same predictions.