Pre-orders are up. These are the hints for the games that are going to be in it:
- a fantastical first-person action-adventure game (Steam for PC) -> Zeno Clash
- an IGF-nominated puzzle adventure title (Steam for PC and Mac, Desura for PC and Linux, DRM-free PC, Mac and Linux download) -> Lume
- a 'scorching' single and multiplayer arcade-strategy game (Steam for PC and Mac) -> Hoard, includes individual keys for two DLC packs.
- a world premiere on PC for a pair of retro RPG-defense games (Desura for PC, DRM-free PC download). -> Soulcaster + Soulcaster II

I think the second one is Amnesia. I don't know about the others.

Edit: forgot to add None of these titles have been in other bundles, as per usual!

Edit 2: Added the games.

I'm guessing this one could be Hoard.

Two games are steam-only... And I'm not interested in the bonus album for once. D:

My first thought for the second one was Bastion, but I don't think it meets all of the crap in the brackets, does it?

It's a shame to see two Steam-only games. Any ideas what the others are?

Could the first person game be Zeno Clash, perhaps?

Sounds like nothing worth interest to me.

It's $3.99 for preordering. When the bundle actually comes out, the starting price will be $2.99.

Oh FFS, two Steam only games!? Yeah, the first bundle started at $1.99. The following bundles had $3.99 preorders and then started at $2.99. Looks like they've seen sense and made the pre-order price match the starting price.
Anyway, if I buy this at all I'll certainly be buying it for as little as I can, two Steam games! Bah! Not according to the site itself:

Doesn't sound very interesting to me. I'm not expecting anything I want from those clues.

Could be Limbo?

as far as I know it isn't on Linux or Desura

You are right - it is not on Desura. Scratch that.

Ah. I was just going on what they did with the last bundle. Whoops. :P