User blog comment:ExSturminator01/Mass Effect 3 Predictions based on ME2 hints/@comment-323597-20100301170702

Also after reading a couple other comments I had some other ideas, if we are borrowing from DA:O I could see you having a choice between two sets of allies depending on your choices in ME and ME2 but also what you do in ME3, for example I could see you being able to have either the Geth or the Quarians as allies but not both, same thing with the Rachni and the Quarians similar to how in DA:O you could have the mages or templars and could have either elves or werewolves.

Also I'm curious what the "default" actions will be if you don't import a character, ME2 basically assumes you are a renegade (as well as an Idiot) if you don't import a ME save game (you let the council die, let Zhu's hope die, possibly killed Helena Blake and Fist, etc.) so maybe a non-imported game you have saved the collector base, urged the Quarians to make war with the Geth, let the Heretics release the virus and I'm not sure what else.