User blog comment:JediSpectre117/Council not helping in ME3/@comment-1157484-20110928014522/@comment-4301893-20111009021949

ME3 has been said to fundamentally different from ME2 in the both the number of choices that have consequences and the EXTENT of those consequences. I agree whether or not the quarians are at war is a big deal, and I'm almost positive that Shepard plays a BIG part in that development. Remember, Legion almost sends very incriminating data to the Geth collective about the quarians, but Shepard intervenes in some way. That may have an effect as well. In truth, we don't know what's going to happen at all, but we do know that whatever happens, it's something that our choices can change.

Also, demos are not final release. They really don't tell you anything about the plot in general and certainly don't indicate how a plot can branch due to choice.