I'm not sure about the authenticity of that particular list, though I do think Bioware isn't going to be done with Mass Effect 3 after the Omega DLC. Hoping for a new ending is wishful thinking; would be great if it is part of a Broken Steel-like plan, but if that's what they were going for then it would have made more sense for the ending to have simply been Shepard leaping into the conduit or something similar, though I suppose that would have invoked plenty of problems of its own, it would have at least made it clear that a true ending was coming later on rather than leaving us with something so uncertain.
Still, expansion of war assets in the final battle would be nice. A Citadel DLC for the final fight would be awesome, as I was looking forward to a last stand by the inhabitants of the Citadel, and actually making some of the Citadel war assets count toward something more than just the final total; maybe even add some new ones. Whether it's going to happen is another matter entirely, as Mass Effect 3 already has a battle for the Citadel, and so does Mass Effect 1, in its ending no less! But a proper battle could have a lot of potential, particularly with war asset involvement; rallying C-Sec and other survivors into a force to take the council tower and access the docking arm controls that Saren used.