User blog comment:ExSturminator01/Mass Effect 3 Predictions based on ME2 hints/@comment-2151196-20100718134318

@Arbington You forgot Harbinger was killed, and in fact, he was no Reaper, he was a Collector. You see him being killed in the ending scene to be exact.

Personally I don't think EDI will have a special role in defeating them. Well, who says you actually will defeat them? On Ilos there are still 12 top researchers of the Protheans in cryostasis.. Maybe you wake them up and create some super weapon.. But only if you kept the Collector station (Collectors are modified Protheans) they can research that kind of weapon. But who knows, it's all speculation. However I am sure it will rely on the choices you made in ME1 and ME2.

I just want to get at least Liara T'Soni, Wrex and Grunt back. Just remember the message you got "Bring Grunt back, we need him and his genetic material, babla" (can't remember exactly)