I'm glad it will integrate in the game. I hope it will just seamlessly transition when you're doing a playthrough, as well.
While I can see the "They kept this back so they could charge us more!" comment, I'd really like to see someone proclaim with a straight face that DE:HR doesn't give you enough value for the purchase price. Especially since 90% of all people bought it for like 30 bucks on GMG.
I will GLADLY pick this up, although the release date sucks a little. October is when Rage comes out, and Skyrim will be just around the corner.