I knew this was going to happen, and I don't like it.
I'm finding it hard even to find the words here, but I cannot see this as anything else than a huge, ginormous even, mistake. If Kasumi is anything to go by, the DLC will not be free, and thus a lot of people are going to miss out on it. And how does this transfer to ME3? Will there be no desiscions to be made so all those who didn't get the DLC won't be completley screwed over?
Bad Bioware, bad. DLC is good for extra content, but as a continuation of the main plot? So many variables to consider, you'd have to be Einstein and Hawking combined to get it right. I'm losing some of my hope for ME3 being the godsend of gaming now.
Also, this Overlord thing sounds like the most bland and uninteresting thing I've seen in a while. Oh noes, not another rogue VI?! Sigh.