While I don't presume to know, yet, the way I interpreted that line was 'the only chance we have is for all of us to put aside all our differences and fight. There's no surrendering to the Reapers, we have nothing to offer them but our lives. So unless every single being in the Galaxy that knows one end of a gun from the other is willing to fight to their last breath, rather than try and run or make a deal with the Reapers, then there's no hope for any of us.'Nimzabaat said:"If you're not ready to die, you're already dead." Paraphrasing but... really? That ranks up there with "We fight or we die, that's the plan". Nope, that's what you do when all of your plans and back-up plans have failed and you have nothing left. Can we tell that Bioware's lead writer quit yet?
Okay, okay. It does look suitably epic and supposedly they fixed all the mistakes from ME2 (haven't seen any sign of that in the ME3 demo yet...) So it is still worth... downloading
Bit of a long-winded explanation for such a short line I know, but that's just my opinion.
Edit: In other News. Motivational speech from Garrus. How can so few seconds of dialogue contain so much win?!