For me:

Castle Crashers as BTA, Tiny and Big, some repeats from other bundle (maybe Limbo for the Vita incoming version).

Fez.

They haven't been doing whole previous bundles for a while now. I think it's because people would give away the key. What they've been doing more recently is adding a bonus key with two or so past games and one new game.

Too soon for this.

Amnesia.

Beat Hazard
Limbo
Psychonauts

Wishful Thinking guess:

Torchlight 2
Don't Starve
Castle Crashers

Machinarium. It always is Machinarium.

Well then.... one or more of the following games:

Cave Story+
Closure
Dungeon Defenders + All DLC
Legend of Grimrock
Offspring Fling
Shank 2
Snapshot
The Basement Collection
The Binding of Isaac + Wrath of the Lamb DLC

:)

Please don't be Torchlight 2, just bought it yesterday :P

Just a couple more hours and we will see
(my silent wish is Don't Starve)

I think we would see Mark of the Ninja first.

Silly question: is it a guarantee that they WILL add more games every time... or just something they have chosen to do?

The Binding of Isaac + dlc
Closure
Shank 2

Wouldn't mind that either :)

It's boosting their sales every time they do this, so I think it's pretty sure thing.
I prefer MotN. I want Don't Starve on GOG, sooner or later.