User blog comment:ExSturminator01/Mass Effect 3 Predictions based on ME2 hints/@comment-2180943-20100718155038

This seems pretty likely. I always had a feeling that saving various species would pay off eventually, and since Liara's the only character from your 2 squads that can't die, it makes sense that she'd have a big role.

And while EDI seems like she could be important, a virus sounds kinda lame for Bioware. An EMP-based-trap would be more epic, flashy, and cinematic.

Otherwise, sweet. Well though-out theory.