this was on GOGs main page
"The big day is approaching and everyone is counting hours, minutes and seconds when the GOG staff members will appear in the spotlight! Believe us, we're all excited about this as well, but first things first. Let us give you some details, so everyone knows who, what, where and when.
Who? All of you, our dear users, are invited to watch the live streaming of the CDP Days 2011 Spring Conference.
What? The live streaming will include presentations by CD Projekt RED with their awesome game The Witcher 2: Assassins of Kings, and GOG.com revealing some cool stuff. Both presentations will be in English.
Where? You'll be able to watch both presentations on GOG.com. On Thursday we'll put up a news post with a live stream video window embedded in it for your convenience.
When? The live streaming of CD Projekt RED presentation will start on Thursday, April 14 at 12:00 p.m. EST (that's 4:00 p.m. GMT).
GOG will hit the stage an hour later at 1:00 p.m. EST (5:00 p.m. GMT)."
Now for the past few hours there have been some clues relating to what this announcement could be and many on the GOG forums have said that it could be LucasArts or EA related and is hotly been discussed as these are the clues so far;
What Game Made you Dream of the Stars?
What Game Made You Ride with the Outlaws?
What Game Made You Fear Your Past?
What Game Made You Go To the Underworld?
What game made you afraid of the dark?
What game makes you feel like a hero?
Now instantly the 2nd clue sticks out as I'm thinking it could be Outlaws from the instant you see that word (although some think its Full Throttle). The first clue could be related to possibly Star Wars or The Dig. Some think the 3rd could be to do with KOTOR and the 4th, like me and many others think it could be related to Grim Fandango. The 4th I can think of for this is the Alone in the Dark series, they only have The New Nightmare on the site already so maybe its the rest of them.
Some of the speculation and emails that people have recieved have suggested it could be more than one publisher so maybe it could be both EA & LucasArts making their GOG.com debuts