Valve: Surprise is Portal 2-themed for God's sake
A rumour-weary Valve said in a press release today that their E3 surprise is related to Portal 2.
After being bombarded by all sorts of rumours related a possible return of the Half-Life series either as an episode or a full-blown sequel, Valve finally teased a little more about their surprise.
The release said that the surprise was a "Portal 2-themed surprise for God's sake".
They also took the time to say that Portal 2 will now be delayed until 2011 promising that "the game will be even better".
Given their track record that is one thing that we can be sure of. This announcement still doesn't rule out the possibility of them showing off Source Engine 2 during the press conference.