My guesses:
- Bryan Danielson (his 'firing' turns out to be one giant swerve and Cole gets pissed that he's been his messenger)
- Michael Cole himself (Cole's been faking receiving e-mails and will turn heel when it's revealed he's the new GM. Seriously, I can see this happening....)
- They haven't actually decided on anyone yet and will keep the GM anonymous until they think of someone suitable....