User blog comment:LilyheartsLightning/Citadel and Reckoning DLC announced/@comment-166.82.178.242-20130221203637/@comment-24174486-20130221203943

The first part of the DLC on Xbox 360 will be charged, while the second half will be "free" (though you can't access the content without both DLCs).

Ah yes, research. We have dismissed that concept.