I am almost sure that the next two character will be Abe and Snake.
Here's why: well,Abe is already rumored,but there's something that make me think that the other is Snake...
Omar said that they will introduce a character from an already represented franchise--->Metal Gear
Seth said that a really requested 3rdParty will make it---->Snake is actually 3rd Party!
What do you think? let me know!