Doug Lombardi and Robin Walker from Valve have given their newest predictions for the second episodic addition to the Half-Life franchise. In a recent interview with IGN, they said that a September release is what they are currently looking at, but offer no guarantees.
"If it finally came to September and we thought the game sucked we wouldn’t ship it." They also stated that if one platform is ready before the others, then that particular version will be released first.
HL2: E2 is to come bundled with both Portaland Team Fortress 2, so fans have a lot to look forward to whenever this package finally does come out.